Yes a tape on diaper can be pulled down like underwear if you just loosen the tapes up a little enough to slide the diaper down your waist.
Then just pull the diaper back up and re tape it back up.
The Velcro cloth like disposable diapers are easier to remove the tapes and then tape them back on to use the bathroom when you don't want to use the diapers.
I no longer use the toilet so I don't worry about it anymore as I poop and pee in my diapers all the time and wouldn't have it any other way.
I wear the plastic backed disposable diapers now and if I try to remove the tapes on the plastic backed diapers the diaper may tear so I don't do it.
I only take my diaper off when it's been used to capacity and is leaking and then I shower and put on a fresh diaper.