I just got my M2 Pro Mini Sunday and have less resolutions available than I did on my 2018 i7 model.
On the Intel, had my 32" 4K display connected via DisplayPort to a TB3 eGPU/Radeon RX 6600XT. 4K is still a little too small, and 2K (which I replaced) looks too big on the 32", so I had it set to 3008 x 1692, which was perfect. Had the same options available regardless of whether it was connected with the eGPU or HDMI/USB-C..
On the M2 Pro, connected directly via HDMI to the same monitor, I can basically do 1080p, 1440p, or 4K. There are a couple odd slightly 2K variations in between the choices, but thats about it on the M2. I've just had to deal with it at 4K so far, which actually seems to be a little bit better than it was on the Intel anyways. I didn't get to try out the USB-C connection because that cable is for the days I work from home to connect and power up my Surface from the office.