If you don't want to use Google Playstore, but need some apps from there, try Aurora Store. It does not update Fdroid Apps, it shows how many trackers the app has. No Google account needed.
If you want apps/updates from Apkmirror, Apkpure, Uptodown, or Aptoide, look at Apkgrabber. Ut handles multiple sources, and you can blacklist your Fdroid apps.
Please comment your rationale for choosing.
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