Puppy won’t pee outside

I need some help! I got a 15 week old King Charles Cavalier puppy 1 week ago (he is slightly older) and he was using pads at the breeder.

Since getting him it’s been such a battle. I don’t think he had ever been outside before we got him. He peed on a pad for several days but then started going on the rug and floor.

I have tried bring mulch inside (it’s what our outside area is that I want him to pee on). I have tried to stay outside for awhile, tired doing 30min in crate and 5-10 outside

He also has crazy bladder control, he held his pee for like 24hrs the other day.

I don’t know what more I can do, I’m so stressed out and I swear he waits to come inside to pee. If I let over by my rug for like 2min he pees or poops, and if I confine him by the pad he goes on the pad quickly.

It’s so frustrating. Is it normal to have a dog who has not peed outside once in a week?