PF2 has sustained spells; you spend one action a round to maintain the spell (and sometimes move it around or affect another parameter). Since it is based on the 3-action system, you are still free to do some other things (most spells are two actions, or move and use a one action spell , like a number of focus spells)). Some caster classes have high level feats to get an extra action to sustain (doesn't stack with haste and other action boosters).