Me again - offering an non-specialist’s suggestions on increasing privacy as I am no expert. As you are probably using an unrooted phone, I think the best app for checking on and blocking trackers is Tracker Control which has been suggested by more knowledgeable people than me. See this post.
Unfortunately you will have to disconnect Mullvad VPN as Tracker Control creates its own VPN connection through which it routes all outgoing traffic to be able to trace outside calls. You could use TC just for a day or so to see which apps are using trackers and then try using Blockada to block specific addresses after switching TC off. In this way you could re-route your traffic through Mullvad which is a serious outfit using encryption to hide your calls.
If you use your browser a lot, I would suggest trying Iceraven which is hardened version of Firefox with “Enhanced Tracking Protection”. You can also add privacy extensions to remove 3rd party cookies and device finger-printing. I also use its containers to keep connections to my bank separate from my other browsing.
I’m not convinced that Qwant is overly privacy-conscious in spite of their claims. I think choosing an instance of Searx and modifying its configuration to choose the searchengines you prefer.
Just my two-cents worth, as they say.