That is still the case. What the Church objects to, based on the teachings of Christ, is adultery, i.e. having sexual relations with someone other than your (first) spouse. So no adultery = no problem.
I find this silly. Ask them if they repented from the act of divorce. heh.
This is between them and God. The idea that humans can step in between a person and God and claim authority to tell you what God thinks is ridiculous.
The Bible doesn’t grant that power to any mortal human.
Either they are members in good standing or they are not, give them the boot if that is the case.
Oddly people are permitted to have relations with other than their first spouse: If they are widowed, or if they merely quietly commit adultery without a remarriage, or if they convert to Catholicism after their second marriage. The church doesn’t want to endorse divorce, but if they don’t have to take a position, well, that isn’t their problem.
One fellow became a deacon, and his wife died. Because he was a deacon he was not permitted to remarry. He eventually was called to became a priest, and was very effective when counseling widows/widowers because he had been there.