Dwarves/Science&Technology

Magitech

⠀Magitech implants

Some of them have magitech implants. For example, Terok Stonebreaker has a mechanical eye that allows him to zoom.

His hands were nearly shaking when he took some measurements with a tool, his mechanical eye sounding like a lens zooming in before he jotted down some numbers on a notepad that was hanging from the wall right next to the rig. – Chapter 243

The dwarf pointed the ladle her way, metal eye zooming in on her as he squinted his other eye. – Chapter 288

• However, apart from Terok himself, no dwarves with implants were mentioned.

Warmachine

Warmachine paradigm shift

Violence! This is actually a theory so it will probably be refuted or confirmed as new chapters are released! 
Forewarned is forearmed, take this into account if you want to use this theory in the discussion.

All the corpses of the Taleen Dwarves found were dressed in armor or in normal clothes, there was never any mention of a single warmachine found in any of the Taleen dungeons mentioned. Only autonomous ones.

Also, Taleen's contemporary, the ancient king Khan Joggoth of another dwarf kingdom, used soul golems called Soul Wardens. They were autonomous magical constructs. Not mechanical.

“Ah if we could get our hands on their machines.”
“Magic, not machines,” one of the shades informed. Chapter 685

This suggests that more than 3000 years ago there was no concept of a warmachine as a "power suit", at that time the dwarves thought of warmachines as "controlled battle golems".
Also, there is nothing complicated about the idea of such a golem, and it was also common among humans who lived nearby at that time.
Some examples: golem in the Temple of Azarinth (Chapter 4), gem golems in the Karheim dungeon(Chapter 445), golems in the Forgotten Passageway under Ravenhall(Chapter 571) and Maro's machine and Rhyvor knights in the Forgotten Passageway(Chapter 263).

This continued until the events of the Disappearance of the Third Sun, the appearance of the current North, the united war of the races of Elos against the Ascended, and the disappearance of the Taleen Dwarf civilization occurred.

During these events, some Taleen dwarves decided to leave for other dwarven kingdoms, whether due to disagreement with the internal rules of Taleen society

“The war culled their numbers. Many of them were proud and fought alongside their creations instead of focusing fully on their power. Those who disagreed and were tired of battle have long joined other Dwarven communities though their secrets remain hidden, most now buried within their tombs.” – Fae, Chapter 438

or to hide the key.

“Taleen that one, one of me ancestors passed it down. Only thing she said was to never give it away,” Kerron said.Fae, Chapter 703

or they just had nowhere to go.
So they used the exits near or in the Naraza Mountain Chain to find new homelands.

Many gates we have found, most not activated or leading to forgotten exits in the Navali forest or the mountains of Naraza. – Isalthar Nauum, Chapter 587

And they brought with them advanced knowledge, but not advanced high knowledge of runes or autonomous warmachine design(see more The Tale of Taleen).

The smith put the third set into the forge, “I do not know if he has any talent at all. They like to use their war machines, enchanting is always necessary. Yet those actually using their machines are rarely the ones best at enchanting itself.” – Goliath, Chapter 243

Terok's main classes are a Metal Mage and a War Machine Engineer, not enchanter and mage.

I’m a metal mage and engineer, not a machine designer. – Terok Stonebreaker

So they most likely brought advanced knowledge of mechanics.

• This is also a rather strange moment, as if there were only engineers among them, where did all the Taleen warmachine designers go?

Thus, there was a paradigm shift and other dwarven settlements everywhere began to create their own war machines.

“I’ve seen war machines in other dwarven cities too,” Verena said.

“Of course. It’s unclear when it all started but I’m sure more than one of us rock brains had the idea to make a powered suit out of metals. I’m more surprised other species don’t do it as often. But much of what I’ve seen outside of the Pit is made to look intimidating, entirely focused on strength, or defense. Ceremonial nearly. If the royal guard of Parior participated in the Dome, I’d bet my gold on one of our semi decent fighters,” he said. –

• In fact, the whole theory may crumble if Eranur is the same age as Joggoth or Taleen, not to mention that the victory of King Valkor over the Joggoth's Army is quite an interesting moment and suggests that the dwarves of that time could have war machines to destroy the powerful Soul Wardens, although it is possible that Joggoth improved Soul Wardens after working together with the Taleen.