Another method is the Suggested Accounts method. Go to each of those accounts and press on the arrow next to the follow button. You’ll see a big list of similar accounts. Go to each of those subsequent accounts and you’ll get a ton of similar accounts.
you can use some popular hashtags from that niche, and then use the repost tool to extract posts based on hashtags. This way you are not limited to the number of accounts. There is a free trial, you can try and see if this will be suitable.
Also, @Micky suggested Pinterest as a great platform to be the source for what you are looking for. There is Scrape Posts feature within Campaigns that you can use to easily scrape bunch of photos from Pinterest
yeah some big niches that involve much more different topic on each post like ‘news’ ,‘entertainement’… if our account is based on this ,well with hastags,suggested …that are more narrowed , we can’t find enough account that do same type of diverse content , so only explore become the reliable choice in this situation
can even have each account with different ‘subniche’ example if its animal repost account, we can have an account that engage only in dogs niche,another with cats… to expand it more .