NFHS Awarded base...then an appeal?

[Blueplate]

R1 on 3rd. Batter hits grounder to SS. SS throws to catcher who is 2-3 feet up the 3rd base line with a knee on the ground(blocking the plate).

R1 slides into the catcher before she has the ball. After catching the ball she tags R1 who hasn't made it to home,because of her obstruction. Both are now laying on the ground. No malicious contact.

PU calls time and awards the runner home on the obstruction call. R1, hearing she is safe, runs towards her dugout(she never touched the plate).

The peanut gallery shouts that she never touched home. Then... the defensive team coach asks the PU "Did she touch the plate?" Never said he was appealing her missing the plate.

As such this was not a proper appeal...or was it?

Questions:
Would R1 be called out or remain safe? If it had been a proper appeal.