I was in the same situation not long ago and spent quite a bit of time searching for something reliable. Many tools online either create artistic avatars or heavily stylized images that don’t really work for a real Facebook profile. Then I found a generator specifically focused on Facebook-ready portraits, and it was much closer to what I needed. Around the middle of my research, I came across this page
Facebook AI photo generator it explains how the AI works and how the photos are optimized for Facebook dimensions and style. What I liked is that it aims for realistic results instead of exaggerated effects, which makes the final image feel more authentic and usable.