I don't think that being pushed out through an exit constitutes assault unless the push force knocked the person down,
I checked NY Penal Law. NY state law definitions of crimes differ substantially from the common-law meanings of the words.
The criminal behavior of the dirty cops was, legally, "reckless endangerment in the second degree" (sec. 120.20) -- both their refusal to wear masks and their shoving -- which is a class A misdemeanor. 2 counts.
It was also, very clearly, "Official Misconduct" (sec 190.00), which is a class A misdemeanor. Again, 2 counts.
Also, I would charge them with "Criminal Nuisance in the Second Degree" (sec. 240.45) -- "by conduct either unlawful in itself or unreasonable under all the circumstances, he knowingly or recklessly creates or maintains a condition which endangers the safety or health of a considerable number of persons" -- class B misdemeanor.
Also, since two of them cooperated in the crime, it's "Conspiracy in the Fifth Degree", another class A misdemeanor.
There are probably others, I didn't go through the whole Penal Law. Anyway, class A misdemeanors are punishable by 364 days in prison and a fine of $1000.
Because there were basically 2 criminal acts (#1 the refusal to wear masks, risking spreading Covid; and #2 the shoving and physical attack), I believe the rule is that they only get two consecutive sentences (the sentences for the crimes which are basically the same criminal act are concurrent). So about 2 years in prison and about $2000 in fines for each of them, ***if the prosecutors did their job***, which prosecutors usually don't.