Hi there! I'm a social media manager and I can help you with your Instagram account issues.
To lift your shadow ban, may I suggest you remove banned hashtags in your posts, there's an app for that, also if you use any Instagram automation you'd be better off removing it.
Then I'd advise you leave the Instagram that has been shadow banned for 2 - 3 days. log out of it permanently.
Then log in again, and post once a day, then for about a week, then you can post we much as 3 times a day.
Let me know if you need my help. I'll be more than happy to help out.
Temitope.