By “we” perhaps you mean your listed religion: “Religion: Ukrainian Orthodox Church”.
The Code of Canon Law, at
vatican.va/archive/ENG1104/__PY.HTM , has:
“THE OBLIGATIONS AND RIGHTS OF CLERICS
Can. 273 …
Can. 276 …
1/ they are first of all to fulfill faithfully and tirelessly the duties of the pastoral ministry;
2/ they are to nourish their spiritual life from the two-fold table of sacred scripture and the Eucharist; therefore, priests are earnestly invited to offer the eucharistic sacrifice daily and deacons to participate in its offering daily;
3/ priests and deacons aspiring to the presbyterate are obliged to carry out the liturgy of the hours daily according to the proper and approved liturgical books; permanent deacons, however, are to carry out the same to the extent defined by the conference of bishops; …”.
So daily Mass is not an obligation, but the Liturgy of the Hours is.