Protestant churches, of course, NEVER allow ceremonies among those who don’t attend regularly.
I’ve been to big protestant weddings where the bride and room were openly living together. Generally such things are the individual decision of the priest, just as they are individual decision of the minister. A discerning individual realizes that it is the priest or minister in that case who is erring, not the entire faith.
First off, marriage isn't a Sacrament for Protties. Marriage is a celebration & in cases where the couple had been living in sin, the marriage is an open sign of repentance.
Back in 1976, I asked the minister of the ELCA church that I had gone to as a child to perform my marriage ceremony. He told me that he'd do it only after I had rejoined the congregation & that meant regular attendance for a year.
My husband to be was a lapsed Catholic. He knew better than to ask the pastor at the church he'd been a member of as a child, but we found two other Catholic churches that were quite willing to perform our marriage Mass.
What's the Catholic Church's current teaching on funeral Mass & burial for those who've committed suicide?