Adult only. Private by design.
What a repeat match allows

The switch is for a later round, and only when a fresh full pairing is gone.
The short answer
Allow a repeat match is a key party switch. Your host invites friends. The host invites friends they'd love to have there. One private link per couple. The label says it is used only when there is no unused pairing. The menu shows it only when the host has chosen more than one round.
One round turns the switch off. A play party does not use it. Couples only on a key party forces one round and turns the switch off. The host can still add rounds on an ordinary key party during the night.
Adult only. Private by design. You confirm you are 18 or older. The host still checks you in. A private no stays private.
When a later round may repeat
Each round looks for a full pairing that has not been used yet. If that fresh pairing exists, the round uses it. The switch does not replace a fresh pairing.
If no full unused pairing is left, and the switch is on, the next round can use a full pairing that repeats someone. The host still starts that round. The switch does not invent a yes that was never given.
If the switch is off and no fresh full pairing remains, the night needs a host choice. It does not silently pair the same people again.
What the switch is not
It is not a group match. A group match is a separate switch, off by default, for an open key party. A repeat match is still a pair.
It is not Re-roll. Re-roll picks another full pairing before the reveal. A repeat match is about a later round after a pairing has already been used.
A night in Atlanta can use more than one round. Dallas can too. Those cities have their own pages. The round count still lives on the party.
The format still decides the reveal
All mutual-yes matches are revealed by the format the host already chose. A repeat match does not show a one-sided yes. A one-sided yes stays hidden.
A key party shows one Play Partner at the same time, after the host starts the reveal. A play party keeps matches hidden until the host reveals them. A speed date is short rounds, then yes or no.
FAQ
Does one round allow a repeat?
No. The switch is shown only when more than one round is chosen. One round turns it off.
Will it repeat someone while a fresh pairing still exists?
No. A full unused pairing is used first. The repeat is only when no unused full pairing is left.
Does couples only use it?
No. Couples only on a key party stays at one round and turns the switch off. A play party does not use rounds.
Is this the same as Re-roll?
No. Re-roll picks another pairing before the reveal. This switch is for a later round.
When do matches show?
All mutual-yes matches are revealed by the format. A key party shows one Play Partner at the same time, after the host starts the reveal. A play party keeps matches hidden until the host reveals them. A speed date is short rounds, then yes or no.