macOS Recovery disk utility is way older than disk utility on my drive
Reinstalling is pretty easy these days:

https://support.apple.com/en-us/HT204904

If the old recovery functions, I wouldn’t worry about it. If you can boot to internet recovery, that also means you don’t need it.

Make a backup - you may need to erase everything to fix this, so be ready now.
Boot to any recovery OS and reinstall your OS - this doesn’t delete anything but does overwrite the system and make a new OS install and migrate all your apps, data, settings to the new install.

If you decide you need this to be updated / perfectly clean, follow the erase install guide. You will need your backup since this deletes everything from your Mac:

https://support.apple.com/en-us/HT208496