Digression: no, Protestants do not have a valid Eucharist, even if they think they have the Real Presence. Valid Holy Orders are needed for a valid Eucharist, and the Church has clearly stated that Anglicans do not have valid Orders in
Apostolicae Curae. And if the Anglicans don’t have valid Orders, certainly other Protestants don’t. The Orthodox certainly
do have valid orders, as well as the Oriental Orthodox, and some other small groups like sedevacantists.
That said, the service involving bread (or rice cakes etc…) and wine (or grape juice etc…) is celebrated very differently in different Protestant groups.
Some call it the Eucharist and have it daily (rare), several times a week, or weekly (common).
Some call it Holy Communion and have it monthly (very common).
Some call it the Lord’s Supper and have it quarterly (very common).
Some have it sporadically, no set schedule.
Some normally never have it at all (like the Salvation Army).
And all of these can be mixed and matched.
Same goes for the belief; some High Church Anglicans believe in Transubstantiation; many Baptists and non-denominationals believe it’s only a reminder; and everything in between.
Same goes for the ritual: And Anglican service can look much like a High Mass; I’ve been to non-denominational places that only pass around a tray with bread and juice with no ritual whatsoever, not even the words of institution.
