Catcher Standing on Plate.

[GaryBarrentine]

ASA 14U Rec Ball.

R1 on 1st, Batter lays down a bunt.

F5 fields and badly over throws F4 in an attempt to force R1 at 2nd, ball gets past F8 and rolls a very long way, R1 scores. As BR rounds 3rd, F2 move to and stands on plate waiting for throw from F6 who is behind 2nd and has taken a cut off throw from F8. BR has to move around F2(who does not have the ball) to attempt to touch the plate. After passing the plate, BR trots into the Dugout(DBT) and is called out by PU for not touching the plate. When asked if not touching a base is an appeal play, PU stated that F2(who never received the ball, ball was thrown by F6 to F1) stated that the runner did not touched the plate.

Question 1, is not touching touching a base an appeal play?
Question 2, if so, can a fielder without the ball appeal a missed base?
Question 3, if no appeal was made, is the runner out if he/she does not touch the plate and enter DBT?
Question 4, Could obstruction be considered, as F2 did not have the ball and run had to move around F2
to attempt to touch the plate?

Thanks
GaryB