@Krandall has very good! advice.
... your puppies are too young to be allowed to roam around the house from room to room, because they are not realiably housebroken yet.
My - still
- Puppy-Like Havanese will be 2 years old Feb 2020. Patti was closely monitored for a year before she had access to multiple rooms in the house, and even then she was gated off the majority of the house. Patti was trained to one room at time. When training her to the TV room, I put her on a leash, let her play on-leash and gated that room off. On leash, I walked her over to the potty tray to show her where it was. When she peed or pooped, I rewarded with a Treat and Praise. After a couple of weeks, I took the leash off in that room and had eyes on her to make sure she knew to go to the potty tray. I repeated the same procedure for other rooms.
During potty-tray training in new rooms: I put a water and a treat bowel by the potty trays. I'd occasionally put a treat in the bowel to encourage her to go back to that area. Later I established two permanent areas in our home for potty trays. One in an TV/Office room and the other in our MB bathroom and removed the other training potty trays. This all takes time and wasn't sudden.
I have ALWAYS had a Doggie Door with a fenced yard with my other dogs. When I gave Patti access to the yard and Doggie Door, in the beginning she preferred to potty indoors on the potty trays. But, now prefers going outside and only occasionally uses the potty trays.
We have a three story condo with no yard in the mountains and I was worried Patti might refuse to use the potty tray up there. Initially, she waited and asked to go outside but after the big snow hit, Patti started using the potty tray. Whew!!! I was not looking forward to having to walk her four times a day in single digit, snowy weather. In addition, when the snow is wet, it's a horrible mess because snow-balls cling and are impacted to her legs and belly fur. And when the sun comes out, melts the snow making mud puddles that's another issue. While, Patti loves playing in dry snow .. I Love not having to walk her on bad days, early morning and late evening hours.
Cats have always had indoor-potty trays, we accept that. It was hard to get my head around doing this with a dog ... but it's Super Convenient and has made life a lot easier having both options. My Doggie Door opens to the outside from our Utility Room. I would have put the potty tray in that room, but can't because we have another dog in the house and I sometimes have to block off that section of the house.
The home is carpeted in the small condo and I place a piece a linoleum under the potty tray, for the rare occasions Patti's butt is hanging too close to the edge to get everything inside.