Thanks for update :3

KAGI use russian yandex index.

True. Waydroid need much polishing. I found waydroid-helper for user friendly GUI .

You can't get RCS without Google Messages. An option is using a messaging apps like Beeper https://www.beeper.com/, which can connect to Google Messages (bridge) so you can read your messages in Beeper.

Unlocking phones has more to do with the phone's manufacturer than the SoC it uses. Developing custom ROMs for MediaTek is more difficult. However, that doesn't mean there aren't devices with MediaTek SoCs that have custom ROMs.

goodram make stuff in Poland.

https://www.goodram.com/en/categories/consumer/

YouTube has been profitable since 2019

Samsung is a joke company. They block oem unlock from One ui 8. Samsung IMS isn't working in custom roms (AOSP) because they have some close implementation of IMS.
You should look to other company for next phone.

They did have name mapy.cz

and Interstellar LINK

Yeah, I confused names 😅

Is self-hosting a YouTube front-end reliable? Public instances often don’t work, but maybe Google doesn’t block private ones?