Any Ideas On How To Potty Train And Retrain My 5 Month Old Cockapoo Puppy To “come”?

How do I ween my puppy off of puppy pads to want to go outside instead? We have used puppy pads since she was a 7 weeks old and I don’t know the best way to change her routine. We are also not home 2 days a week for 8 hours, so on those days, do I train her to wait till I come home to go out and do her business. Or should I let her continue to use the puppy pads on those days?
Also, she stopped following the “Come” command. She was very good at the command and we followed up with treats but were trying to wean her off treats to reward her with praise and she did well with it for awhile but she’s now not responding to the come command. I don’t know if its because she’s trying to assert her independence or if she forgets but any ideas on what to do? Should I go back to using treats again to re-train the come command?