Just wanted to add if one would like to only sequence patterns (as OP described) in a ‘pure’ playback fashion. And have no intention to use the Arranger more than playing them over and over (ie no programmed event muting etc), you also have the option of just chaining patterns…
Press and hold Pattern button, select one or more patterns (trig buttons). If more than one pattern are selected, they will be played back in the order you pressed all those pattern selections.