Crate training/house training

That's pretty normal for puppies. Think of it how you don't (usually) have to get up to use the restroom during the night while you're sleeping, but when you're awake and active you have to use the restroom more often. This is especially true for puppies who don't have full control of their bladder yet. You can't expect a dog to be fully, 100% house trained until they're around a year old because they simply don't have the brain to bladder connection.

At this age you can't depend on the dog to let you know he has to go out. Sure, he'll probably alert sometimes, but he might not realize he has to go until he's going. They're still easily distracted. At this time he still needs careful supervision for any signs of needing to go. Keep potty breaks frequent when he's active, and make sure to reward heavily for going outside. He's not a baby anymore and likely has the idea of going potty outside, but he still needs your guidance to really cement the behavior and help him be successful.

I think if the time he can go between potty breaks isn't increasing, though, and you feel his urination is excessive, I would take him to a vet to check for a UTI. Doesn't hurt, and if that's ruled out you know it's simply that he's still developing his bladder.

@0691jj Are you going out with your pup still and throwing him a treat party when he potties in the right place? It's really important to teach a dog that pottying outside is waaay more rewarding than pottying inside, so they're motivated to hold it until you can let them out. Otherwise he might not understand why pottying outdoors is any better than pottying inside. Definitely keep him confined to an area where you can watch him when he's outside the crate, so you notice when he starts asking to go out and he can't sneak off and pee elsewhere - the more often he pees in the house, the more he builds that habit. Clean up any accidents really well with an enzymatic cleaner meant for pet messes - these break down the smell so that even a dog's nose can't detect it, so it no longer smells like a potty spot to them. You can even get a small blacklight to help you find pee spots that need cleaning.

And yes, if he doesn't seem to be able to hold it longer, it's worth getting a vet exam to rule out a urinary tract infection or any other problem.

@Amila I wouldn't expect my 2.5 year old Lagotto to not have to pee for four hours after a walk, especially if he's eaten and drunk water in the meantime! He might empty himself really well when he's outside, but having a drink and a meal often gets those systems moving again. If you're worried she's going to start demanding to go out because she wants to play or explore, than take her out on-leash and keep things very boring. Go to a boring spot, wait until she pees or poos, quick reward, then right back inside. All business, no fun, so she learns that asking for a potty break at that time means that all she gets is a potty break, not a fun walk or playtime.