All Geckos can sync if Mozilla Sync is enabled with an account. So you can sync say LibreWokf or WarwrFox on desktop to any mobile version, such as IronFoz. They do not have to “match”.

After flitting around to different ESS readers ive settled on NewsBlur. I really really like it - the free version is fully functional, but the paid has awesome quality of life features.

Available in browser and from F-Droid