i post car photos on my 107K, i just go to another car page in my niche, find a photo i know will get good engagement, then screenshot it, crop out the other stuff so it's JUST the picture, then post it, and usually other pages in my niche have a "owner/photographer" of each car so i screenshot that in their caption as well, post it, add the owner and photographers name in MY caption and that's it, i have over 1,800 posts, never had a problem, if for some reason i can't find the owner or photographers name i just put in the caption where i'd normally put their username, i just say, "Tag them!" instead, and if they get tagged by one of my follows, i edit the caption and tag the rightful owner/photographer of the car posted, this might not help you because you might not be in the car niche like me but that's how i always do it. have a good one