If youre looking for a thin, and i mean actually THIN, memory foam pillow, check out these Bluewave Bedding slim pillows. The thinnest one is only 2.25 inches tall. https://www.amazon.com/gp/product/B06XPMNP76/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Also, i see no mention of Latex pillows here. Latex pillows, i found, are similar to memory foam except they keep their shape, your head doesn't sink into them as much, and they're a bit firmer.
Have you tried a very thin pillow? This way your neck won’t be arched when on your stomach. I’ve tried a version of this (below) but had to return it because I sleep on my side mostly, but it was great when I was on my stomach
Bluewave Bedding Ultra Slim Gel Memory Foam Pillow for Stomach and Back Sleepers - Thin and Flat Therapeutic Design for Spinal Alignment, Better Breathing and Enhanced Sleeping (Full Pillow Shape) https://www.amazon.com/dp/B06XPMNP76/ref=cm_sw_r_cp_api_i_nY9SDb0JV6BYB
A flat pillow or an extra-firm pillow for me is perfect as i'm a stomach sleeper, the best i found is this one: https://www.amazon.com/Bluewave-Bedding-Memory-Stomach-Sleepers/dp/B06XPMNP76