If you want to check to see if you have your update, go to your settings and find the update section. Usually, the phone will check for updates automatically, but not all the time. Just know that since it’s a major platform update, the file will be rather big and take a while to download.
This series differs from the Galaxy S22 series because both the smaller variants of the S20 phones had 1440p+ displays, whereas the Galaxy S22 and S22+ will have 1080p+ displays. The S20’s displays got up to an impressive 1200 nit brightness and ran at 120Hz. The screens on the Galaxy S20 will more than suffice today.
You’ll still get killer performance, a gorgeous display, and very respectable cameras. This is all wrapped up in a package that should cost less than the base Galaxy S22 phone.