Low Engagement

Hello all, I have a luxury IG account that I am growing through Instagress just doing following and unfollowing on normal settings. I follow around 1000 accounts then I'll turn the bot off for 2 days and start unfollowing after that. I have currently ~4.9k followers and am growing at a rate of ~40-60 followers a day. The only thing I notice is that my engagement is around 80-90 likes per picture and they have been just getting lower as time progresses. My last 3 posts are averaging 35-60 likes. It's good content and I post 2 times a day. An account with my following of real followers should be receiving many more likes. Can anyone help me out with what I'm doing incorrectly?

try adding some likes/comments on your engagments. If you don't engage you're unlikely going to get any back. You should aim for around 3-5% engagement for any instagress accounts.

Follow/unfollow is not the best method anymore to get good engagement rate, try liking specific account, don't do follow/unfollow for a time