Yes, you have lost Right of Abode. No exceptions due to Covid. However, as noted on the page you linked, you have simply been downgraded to Right to Land. You keep the right to live and work freely in HK. All you lose is the right to vote, some tax benefits on property purchases, and eligibility for some government cash handouts.

I believe that you can still travel to HK on the basis of your existing HKID showing RoA. You should enter via a manned Immigration desk, and will be advised to replace your HKID during your visit.