Questions about LG 50UP75003LF

Blue TV works on LG devices built in 2018 or later: https://www.blueplus.ch/de/tv-app?gclid=CjwKCAjw7cGUBhA9EiwArBAvoos5b7f6xtGtAS9FlJr2XS9CExyH8Guwxwk0NMCmturJm3a_FXyWaRoCWUEQAvD_BwE&gclsrc=aw.ds So yes, Blue TV compatible.

Yes, Disney Plus is now available on all LG TVs with webOS 3.0 and newer (from model year 2016).

All devices that offer the LG Content Store therefore also offer Disney+. You can find the complete list at the following link: https://de.lgappstv.com/main