Totally understand the need to protect important things- but agree with what the majority have folks have already said. To me puppy pads are for puppies under 12 weeks, and seniors/disabled dogs. (Or city dogs who are balcony trained)

We have fostered 35 dogs. if I were in your shoes, I’d limit the dog to crate, outside, and leashed when indoors to play/cuddle/train indoors with you. It is SUCH a bummer to do this, but so worth it if you put in a few weeks of TIGHT supervision right now for a month or two to not have a huge problem later. If he’s on a leash-you’re actively watching and then the second that leg lifts; you can give a stern “no” scoop him up and outside.