I'm a mobile dev and I do ASO, I'm open to chat and show you on what metrics you need to look at in the app store connect. Let me know if you're up for it. I tried to DM on Twitter but your DMs are off
I've just checked your app and it's not even ranked for "workout tracker", " gym logger" etc. You're losing a lot of organic visibility from the App Store. If I were you I'd look into an experienced ASO specialist to level up your app store game, for example, @nickjsheriff (Twitter).
Also, $80-120/h for the iOS dev hour is a lot, I assume you hire in the US?