Daytime naps are becoming very difficult. Advice please?

I’m struggling to get my puppy to nap in his crate during the daytime. Common problem I know. He’s been fine in it at night and in the evening. I know my puppy is tired in the daytime because he will fall asleep on my lap. Just given up again after 2 hours and he’s on my lap falling asleep… I’m happy for him to do this occasionally but I’m trying to establish a routine where I can leave him to at least have an hour to myself in the day.

He has actually napped twice in here alone with the crate door open this week so I know he CAN do it. Once for 40 mins and once for 2 hours.

If I lock him in the crate in the day he will rip up his vet bed and eat it. I’m tempted to take it out but tbh I’m scared to force him in the crate incase he decides he hates it at night time. If I can’t get a break at night I’m going to lose my mind. It’s literally the one thing keeping me going atm knowing he’s good at night. We toss treats in the crate and he knows ‘go in your crate’. He seems to like it in there.

I’ve tried signalling for nap time, closing the curtains partially and putting on white noise. Removing all fun toys. I tried covering his crate but he just messes with the blankets.

He will seemingly find anything to do where I HAVE to give him attention. His latest one was bashing into his playpen walls so much that he was able to make a gap underneath to try and get out.

I’m really struggling. He’s a good puppy but I’m finding the afternoons so difficult with him. We do one socialisation trip a day with him to tire him out plus snuffle mat/puzzle/chew low energy type activities in small sessions. I’m trying to do everything by the book best I can.

I’ve just been crying all day I just don’t know what to do. I feel like anything I try I could do wrong. I want to just lock him in the crate, take out all bedding and do enforced naps but I’m worried to make him hate it. But on the other hand I know people have to just pen and crate their dogs when they go to work etc and they’ll be fine. Constantly torn between worrying about being too mean and to soft with him.

He’s a 12 week old chi. We’ve had him 12 days.