Many apps opt to keep the swiping as a discoverability feature, because they rely on their target audience figuring things out on their own. But, not every group will do that, and generally the older they get, the less likely they will trial and error their way through an application.
As you mentioned there are multiple ways to figure out what your users do find intuitive. The easiest 'fix' to try out, is to add a cue that tells your users they can edit the item. This could simply be a label saying 'edit', or a button. The main thing is that it's something they can press to reveal more actions.
This list of actions (rename, locate and forget) needs to be presented in a way that naturally flows from the previous action. You could opt for a drawer or a pop-up, basically something that contains the actions and is easily tapped.
Testing this remains important of course.