Time to Upgrade your Lubuntu 21.04 OS
This means if you're still using Lubuntu 21.04, you have at most a week to plan and perform your release-upgrade to move to the newer Lubuntu 21.10 release. If you don't upgrade in time, you'll find all security updates will cease, and adding software or subsequent release-upgrades maybe become more difficult. If you're still using Lubuntu 21.04, please note the following which are useful, starting with Lubuntu release notes - https://lubuntu.me/impish-released/
To ensure you don't have any specific issues with your hardware with your Ubuntu base, it's always a good idea to also scan or read the standard Ubuntu releases notes too - and the Lubuntu's manual guide to release-upgrading.