When I restarted cycling again in earnest, my old saddles and flat rear, created the same issue. As a result, I spent a fortune of new saddles to find one, like the three bears, felt just right. But, that was not quite enough, after a while, even the best saddle I could find still would start hurting, so I looked at the other component that meets (meats?) the seat, my bike shorts. I was buying pretty cheap shorts without much padding or would wear out quickly. Upgrading my shorts to more expensive in combination with a good bike seat made a huge difference. A third component is making sure your bike seat is adjusted correctly, fore/aft as well as pitch. In general, my seats are set by a level to be perfectly horizontal, which is a good place to start. Some prefer a more forward or rearward tilt, but rearward puts more pressure on your sit bones - so I would recommend horizontal or slightly forward (which I have on my bike with aero bars.

Unfortunately there is no magic recommendation to make your pain go away, except time and trial and error until you find the right combination. (As an aside, having a too narrow seat one one bike was a major PITA until I measured my sit bones and found it was the worst option. The internet has plenty on how to measure sit bones and recommended saddle widths. Also, don’t buy a too soft saddle. They will feel comfy for the first few miles, but then the pain begins (BTDT too). Medium firm works great for me unless you are keeping your trips under 10 miles.