Resizing one design into 3 ratios was killing me

I post for personal branding across Instagram, TikTok and LinkedIn — all different ratios. I kept redesigning the same carousel for 1:1, then 4:5, then 9:16. So I added ratio-free: design once on a topic, AI lays it out across all 4 ratios, I just download. Which ratios do you actually post in most?