I’m the same age and relate to your struggle to spend money on luxuries for yourself. Before I had kids, I made way less money, but I had tons of free time to shop, have fun with friends, just be out and about, so I was always finding opportunities to spend money. When you’re busy with family responsibilities and are accustomed to saving, you have to go out of your way to think of something you want to buy.
I have a ton of anxiety about AI making my job obsolete, so I would save any extra money. But if I didn’t have that anxiety, I would spend that money on upgrading a vacation (not accommodations but destination. E.g. Italy instead of Florida.) Or I might treat myself to a monthly massage and weekly yoga class and put the rest toward savings.
I don’t care about clothes and accessories anymore, but if I did, I’d be more inclined to save the $500/mo up to buy a big ticket item like a fancy piece of jewelry or handbag, rather than buy clothes.