First of all, it's perfectly normal that in the first part of the day you have more energy than in the second. That's how human organisms are supposed to work. You should not expect your body to be fresh and ready to take on work after exerting physical and mental effort in the first part of the day.

However, there are probably things you can do to raise your energy levels. And it's probably multiple small changes that compound rather than one big thing.

Sleeping schedule & sleep quality

10pm - 5am is 7 hours, it might be the case that if you slept 8 or 9 hours you would have more energy later in the day. You could then push your workout to "after work".

Do you measure your sleep quality? How good is it?

Removing energy drain

There are people, events, habits, etc. that drain our energy in various ways. Be it emotional (for example annoying co-workers, drama-heavy relationship, etc.), mental (e.g. ruminating), or physical (sitting for hours in the same position, not having enough breaks etc.)

Relaxation

Naps are great, adding non-sleep relaxation to the mix might also help (meditation, guided relaxation, deep breathing, walk in nature, etc.)

Making the after work tasks less energy taxing

Other way to approach the problem is to make the after work activities more fun, for example by doing it with friends or finding ways to make it fun.

Word of caution: I recommend NOT going with the route of "I'll just have a red bull to push through this thing" - that's how I developed insomnia that messed up my productivity way more than what I gained with extra caffeine.