The "three eyes" part of the adepti's title refers to the "third eye" possessed by those with the ability to manipulate elemental energy, which for humans takes the form of a Vision. For adepti such as Cloud Retainer and Mountain Shaper, the human understanding is that they must have an "inner eye" that serves the same purpose as a Vision. Xiao, however, typically appears in a human form, so he dutifully wears a Vision to comply with the expected norm.
You can learn more about xiao here - https://genshin.mihoyo.com/en/news/detail/8642
From this I believe it is fake to blend in. Adepti do not require vision to wield elemental powers.
More info about Xiao 魈 (referring to a specific kind of demon) from Mihoyo:
Outside of Genshin Impact, the term "sanyan wuxian" can be traced back to ancient Chinese texts and also appears in supernatural fiction from the Late Imperial period (c. 1368–1911 CE). In both cases, it typically describes the Daoist deity Huaguang Tianwang (华光天王, "Heavenly King of Radiant Light"), also known as Ma Lingguan (马灵官, "Numinous Official Ma"). Huaguang Tianwang is a well-known guardian deity, who appears in the Ming-dynasty novel Journey to the South, in which he has an altercation with Sun Wukong. Research into folk culture also shows there is precedent to connect deities known as Wuxian (五显, "Five manifestations" or "Five Named Xian") with a group of malevolent deities known as Wutong (五通, "Five Powers" or "Five Named Tong"), which includes the one-legged, people-eating, mountain-dwelling demons known as Shanxiao (山魈, "mountain demon").
So, at the most hidden but fundamental level of this character's core, we decided on the name Xiao (魈) and the identity of a guardian-adeptus. The name Xiao is used to hide his past, but also embodies this character at the innermost part of his soul. It is the starting point for all further character development and cultural embellishments.
That "leaked" banner was not accurate. Beidou and Xinyan are correct, but instead of barbara it's Diona. MiHoYo just posted the patch notes that released both Xiao and Keqing's banner here: https://genshin.mihoyo.com/en/news/detail/8418
Unfortunately I don’t make my own almond tofu often and when I do, it’s from box mixes. It’s not quite the same but definitely easier so if you want to try you can often find them at your local Asian supermart or here, I found a link on Amazon: https://www.amazon.com/Jen-Yi-JenYi-Almond-Delight/dp/B005F0KZBO/ref=mp_s_a_1_3?crid=54FUN8730VZE&keywords=almond+tofu&qid=1659894887&sprefix=almond+tofu%2Caps%2C77&sr=8-3
All of the winning artworks can be found here: https://genshin.mihoyo.com/en/news/detail/18976
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First Prize (1 Winner)
u/n24385042
Second Prize (3 Winners)
kuury_
u/zanasheep
u/lida_ekota_
Third Prize (5 Winners)
u/izuity
u/PSDee_art
u/WeiYunLin22
u/shinccoon86
u/pun_rii
Lucky Prize (10 Winners)
einsu
thingamabear
u/helen_zzhao
rinnnnnny
koi_kuze
bbebbeat
u/hexxart
krispiacity
u/Azuraline_art
u/aliciatherat1
links for purchase (not verified by myself)
Dakimakura: https://dakimakura.online/genshin-impact-xiao-body-pillow-genshin-impact-dakimakura-p4889.html