I'm having a few issues..

[s_os]

When I went from 1.19.1 to 1.19.3 it didn't save any of the settings I set up,
Secondly I can't seem to find Optifine even though I saw in another thread that it is supposed to be in the addons section and when I tried to download Optifine off of the website and put it into the addons section I can't see the shaders folder (the reason I want Optifine on Aristois) if anyone is able to help me please do so. (also sorry if this is the wrong place to post this)

[Dyiing]

When I went from 1.19.1 to 1.19.3 it didn't save any of the settings I set up

Configs are saved for each version. If you want to transfer the settings you can move the file .minecraft/libraries/EMC/X/configs or use .config save.

Secondly I can't seem to find Optifine

OptiFine is not released for 1.19.3.