That's because LG is shutting down the update servers for its old smartphones on June 30, per Android Authority. This won't just affect updates you download directly to the phone;

The LG Bridge PC software is also shutting down at the end of June, which is used to transfer files and contacts from LG phones, alongside support for updates, backups, and device restoration.

LG left the smartphone industry in 2021, and the company laid out a three-year plan to continue supporting users with new updates for eligible phone models. That support has continued for a little longer than the pledged time, but now LG is shutting down its smartphone update servers on June 30.