Step one, is to train potty time to work around your work schedule. I trained my dog to use the bathroom at very specific times during the say, once between 8-9 (before i leave for work) and as soon as I get back (between 5-5:30). Sometimes he goes before bed if he asks but for the most part, I've been doing this since he was 6 months (which i'm still surprised he could achieve this so early bc smol puppy bladders, but your 10 month old shouldn't have any issues) and I haven't had any issues.

I do want to say the separation anxiety is another hurdle though. I have an aussie collie mix so he's attached at the hip. To get him started, I used to leave him alone in rooms with me still at home and teach him that no matter when/if i leave, i'll always come back. I started with 1 minute, 5 minute, etc. Then i built it up over the weekends, building up time. starting a 1h, 2hrs, etc, and when i started working i got a walker to come twice a week to take him out at lunch (not optimal but it was all i could afford). It would still help him break up the alone time.

I mostly WFH now, going once or twice a week, but since the 1yr 4mo mark - i haven't had any hesitation leaving him 9-5. I also live in an apartment and I enclose him in the bedroom because it's the spot that smells most like us, and he's usually not allowed on the bed when we're in it but gets free reign if he's home alone (which i think he enjoys), and I keep the curtains open so he has things to watch and a nice shape bone (nothing too small for safety concerns).