With similar height (192cm, 86,3cm bb to saddle), I can recommend the following bikes by own experience :
Dengfu R12 : perfect geometry for tall riders, I even used a - 17deg stem
Ican A9: a stiff aero crit/ race bike
Adapt a-002/ Tavelo attack: currently testing this bike and so far I like it very much, a bit more compliant compared to the Ican, lighter and yet very responsive. It's just tall enough for me to still look good (not too exaggerated seatpost exposure and stem sspacers)

Advantages of inner tubes (TPU/ latex)
- lighter
- cheaper
- less of a hassle to install
- no dirty frame (sealant sprayed on your frame) when you puncture

Advantages of tubeless:
- slightly better rolling resistance
- less chance of 'fatal' punctures, but no 100 percent  guarantee for a puncture free ride

TPU is the lightest option.
I believe the tests for rolling resistance that I've seen are a tiny bit in favour of Latex inner tubes, both outperforming butyl.
My personal experience is that latex does feel better: it rides more comfortable and it feels more stable in the corners. Likely because there is more material compared to TPU which will help to damp vibrations.
Concerning puncture protection, I have the feeling that latex tubes do very well since they are very flexible and small objects do not immediately cut through it.
That said, I do ride TPU since I don't want to inflate my tires every day.

Has anyone tried insoles for high arch support?

Something like these g8 knockoffs ( they don't come in my size    )
https://www.aliexpress.com/item/1005005790948377.html

Asking $120 for insoles ( looking at you g8s ), seems crazy.

I've ordered them, they are exactly the same as the original ones. You can only order one size which you can cut smaller (size 46 down to 40 I beleive)

Another option, though I have no experience with them may be the BigRock Skyline II one piece bars. They are only on Taobao right now, but since you listed that as an option they seem to be enjoying a good reputation in China.

Any tips on how to find / buy this handlebar on Taobao as a western person?

That said, I like a good deal as much as the next guy and I'm wondering how much life you're getting out of the various AliX pads.

From my own experience, the longevity is mainly determined by the type of compound (sintered, ceramic, resin..) rather than the brand.
I can't really determine any difference in wear between the sram/shimano brake pads and the aliex ones.

Hambini got this frame a review

Honest 'reaming' and I like his sense of humor. It's always a good reminder to be careful with reviews from youtubers/influencers that 'got' their frame from the brand spontaneously for reviewing.