It’s been like that for a few months now since the LTS released. If your URP build is taking 10 times longer, it’s expected.
You can follow these topics, too:
Improvements are supposed to be coming in version “23.1” with backports to earlier versions but no amount of promises will restore the hours losts over the last few months, so I recommend downgrading back to your stable Unity version before you commit into this LTS with changes that are harder to revert.
I don’t mean to throw shade at Unity team here because they are apparently dealing with quite a lot lately so I understand that sometimes improvements in one engine part may be detrimental in some other engine module but yeah… if you value your time, don’t use this LTS.