Your best bet for the time being would be using mollyim-insider-android and that's what I use on my spare phone (Signal on main phone):
So far everything works as expected. Good luck!
SenXEk
joined 2 years ago
Geary
Kmail
claws-mail
It's not the exact same feature as Telegram because Signal's scheduled message does not sync across all devices.
For screenshot, you can use Flameshot which do have a Windows version and even a macOS version:
https://flameshot.org/#download