On the days I go into the office (usually once a week);
4:30 AM: Wake Up/Feed Dogs (I give them an hour before walking)
5:30 AM: Dog walk. Once light (about 6am ATM) move from roads into woods and let them run.
6:30 AM: Shower/Get ready.
7:00 AM: Walk to station, with dogs. Parents pick my dogs up (they're lovely like that!)
7:30 AM: Train.
18:30: Pick dogs up from parents on way back from station and walk home (parents feed them at 17:00, so they're ready for evening poos!)
19:00 PM: Get home.
20:00 PM: Once I'm fed, games in the garden (usually fetch) for 20/30 minutes just to bond. Walking only gets you so far and I like to give them fusses when I'm back from work (rightly or wrongly!)
Parents walk my dogs for 60 minutes at lunch.
I have high energy dogs (Golden Retriever, Dalmatian and a Cocker). So they need a good 2+hrs of exercise a day.
Admittedly, I spend a lot of time on my dogs. Way more than most people, I imagine. My life reflects that my dogs are my priority tbh. And I fully appreciate not everyone is lucky enough to have the setup I do!
In your case, I would ease yourself in - maybe a few days here or there. If your dog is used to you being there and is older, it can be quite an adjustment. My cocker cried herself sick the first time I went into the office post-COVID. And I had gone into the office twice a week before COVID so it wasn't new.