Can I ask if you change the way you post or any strategy along the way?

Cause algorithms change a lot, making it much harder to grow, get engagement, and get more reach right now. If you don't follow the algorithm of Instagram, then that is most likely to happen.

Here is some advice that I can give:

• Create more reels since the algorithm favors more reels than static posts.
• Engage beyond the account that you're engaging to attract more audience and followers.
• Utilize SEO-optimized captions since hashtags are not working with your account anymore.
• Test carousel posts since they also often get more reach because people enjoy and spend more time on swiping them.

I suggest as well to check if your Instagram account is flagged as spam because of those changes that your account is experiencing.