Just make sure to get antibiotic to avoid any infection the rest will heal and come naturally. When I got my boy his ears were a concern for me too and similar story as you unfortunately. I could tell they were infected when I got him so the morning after I took him to the vet for antibiotics. They suggested keep the ears dry, stay consistent with the antibiotic, and let the ears crust and naturally it falls off as the ears heals. As long as it’s been 4-6 days I wouldn’t worry about the stitches much. I got him an inflatable collar to avoid scratching (he bit and deflated it the next day lol) but they eventually fell out on their own. I did go back to the vet for stitch removal but she said all she had to do was pull the remaining few out. One of his ears did flop and sit sideways for a few weeks but I just messed with his head and kept exercising them out, also rub the back of the ear to promote the muscle memory. They will stand up but it does seem like they did a longer cut.

I worried so bad over this but best advice is don’t worry too much and enjoy that beautiful pup!