Sleep stuff- baby slowly changing schedule?

So my son goes to bed at 7pm everynight. He starts getting fussy around 6:15 (after we have dinner)z We start his bedtime routine around 6:30-6:45. He sleeps until 7-8am.

But recently, he’s been getting fussier and “ready for bed” between 5:30-6. He seems to be trying to push his bedtime earlier. And I’m trying to avoid that since... I don’t want him to wake earlier than 7am 😂

He’s also been fighting/refusing his second nap.

I’m not sure what to do. Normally I go off his cues, but am considering trying to implement a more strict “schedule” for his sleep since starting this week I only work one day a week and can keep him on track.

Anyone else’s babies pushing sleep schedules? What are you doing about it? I’ve considered cutting out his second nap (as much as I don’t want to) and seeing if either he 1.) sleeps more at night, or 2.) takes a longer first nap.