Firefox iOS won't sync

I'm pretty frustrated. This issue has been happening for at least two months. My phone: - shows up on "Devices & apps" on both desktop + phone - shows up on desktop "Send tab to device" - last time sync appeared, it said "Last synced 2020-02-28". I press the sync button; it swirls for one second and then stops, and then continues to say 2020-02-28. I disconnected my phone from synced devices, and then reconnected. Now it doesn't say 2020-02-28, it doesn't say anything. I press the sync swirl, it swirls for one second and then stops, and doesn't actually sync with desktop. > My phone does NOT show up under "Synced tabs" on desktop; it just says "Connect another device" - yet I can send a tab from my desktop to my phone. Help?!