Found the solution here:
https://customeruseinfo.com/solved-google-chrome-and-system-webview-isnt-getting-up-to-date/ > Clear Google Play Store Cache and Storage
Settings > Apps and Notifications > Google Play Store > Storage & Cache > Clear storage
Then confirm and try updating again -> works
If you are asking for yourself and no one uses your phone, then Reddy's answer has the idea. But if you're asking because you saw this on a partner's activity, which is legal if they give you permission to use the phone, then I've been there, and here is possibility number 2. It is when the individual reads their account to the device. Why would they do that?...
Boot to TWRP, sideload Lineage, from TWRP reboot to Recovery. Lineage Recovery will load. Sideload the gapps. Reboot to system.
A few things:
I did get stressed out about the slot thing, but from TWRP, rebooting to Recovery sends to Lineage Recovery (along with a different slot [sometimes?)], so things get a little counter intuitive.
In the ...
I'm not sure if this will work for you AND I'm NOT RESPONSIBLE of anything regarding you or/and your phone/whatsapp chats history/job/career/finances/anything else/etc... but:
I had installed the GooglePlayStore from this link and then restarted my phone;
I had installed the latest Whatsapp version which works on my machine, from this link and then ...