IG - Caption Shootouts are dead?

Hey all,
I run a network with a few million followers in the pet niche,
and I’ve used caption shoutouts as a key tool for growth until the last few months,
where I saw the effectiveness of caption shoutouts diminishes to non existence ,

I’ve tried all types of posts, Pictures/Reels/Regular form videos they still get quite a lot of reach, some even more than before.

was wondering if someone else is running into this issue with his IG network.

Thanks in advance to whoever gives their 2 cents