We have a dog and both of us work full time. My OH works solely from home with occasional travel. I work 20-30 mins from home in pre/post Covid times, however have been working entirely from home for the past year (And will be for the foreseeable). The times when he travels, I work from home so our dog isn’t home alone all day. Seems to work very well!
What I would say though is our dog does not give a stuff whether we are there or not. She sleeps the entire day (Aside from waking up to bark at cats or birds in the garden or the postman) or sun baths in the conservatory if the sun is out. The most we leave her is 4 hours if we go out of an evening and we leave her in one spot, come back, and very often, it’s obvious that she hasn’t moved. Also have a camera that we use to check on her to see what she is up to - Generally sleeping!
What I would say is that she is a 3 year old Jack Russell cross who we’ve owned since she was 8 weeks old and have trained her ourselves and paid for training from a professional from day one and I credit that very heavily as to why she is okay with being left alone for short periods (Most we’ve ever done was an emergency where she was left for 6 hours - She was fine, nothing chewed, no accidents, she was just jolly relieved to get out in the garden for a wee!). She is showered with love and affection when we get home and gets treats and play time with us when we come home, no matter how long we are gone for. She is also walked 30 mins in the morning and at least 30 mins, usually 1 hour plus in the late afternoon/early evening which I do think takes the edge off of her energy levels. She comes on holiday with us (We holiday in this country - I don’t like flying particularly and OH travels abroad for work and worked away for 15 years so no hankering to travel to far flung places) and she comes with us - She has been up and down the country in her 3 years so far and adores nothing more than a zoom on beaches, long walks across hills and up mountains. What I’m trying to say is that how you train them accounts for so much of their behaviour.
OH and me were ruled out of rescuing by 7 different charities and were tbh, treated like shit by two of them for wanting a dog whilst working full time - Despite OH working permanently from home. Between us, we earn well in to 6 figures so no issue of affording dog walkers or day care for the dog if OH ever changed jobs and didn’t work from home but this still wasn’t good enough. Own our own home with a 2m high fence the entire way around our 80ft long garden. We’ve both had dogs in our families for our entire lifetime so are experienced, knowledgeable people yet this still wasn’t enough. I don’t know what more rescue centres want in all honesty but it does beg the question, realistically, what do you have to offer to be an ideal dog owner!