I'd recommend using a toilet cleaner of some kind, just because regular soap might not be strong enough. If you want something gentle and septic safe, I'd use something from Seventh Generation: https://www.seventhgeneration.com/toilet-bowl-cleaner
Do you want to clear a clog or clean a toilet?
Pour in blue Dawn dish soap and wait for it to set. The dish soap will dissolve the toilet paper therefore unclogging the toilet