Search new posts in instagram method

Since 2020 i'm working with instagram sending DM with more than 20 accounts for some niches, i search posts by the hashtag they use.. Like #fitness #dogs and others, i used to search the last post in the instagram using thoose hashtags, so ever 10-20sec they show me one new post and i send DM to this account. However, since aug/23 they stopped showing the new posts searching by the hashtag and now they are showing only most engaged posts by the hashtag. My earnings dropped from $3-5k/month to almost $0 =/
How can I search for new posts nowadays within a specific niche on Instagram?
I used to do this automatically, this is why is so important ever time that i refresh the page, the instagram shows a new account/post for me.

Thank you for your attention.