In many places, those who frequent the Novus Ordo today will have their Corpus Christi observance. Also, in some places where the TLM is celebrated there will be an “external” celebration of Corpus Christi on this 2nd Sunday after Pentecost.
Either way it is a Sunday. Even as Masses are starting to open up again, I think nearly everywhere people are still dispensed from the obligation of attending Sunday Mass.
It may be that you went to church for Mass. It may be that you heard a sermon via the internet.
Was there a good point made in the sermon you heard at the Mass for your Sunday, either live or on the internet? Let us know what it was.
Also, let us know about church openings and Masses in your area.