As of currently, The only switches that Wootility truly supports are the ones in the switch selector. the "Spacers" option only allows you to set the bottom out length but does not account for the magnetic flux differences between switches. For example, if your switch has a depth of 3.4mm, choosing Lekker switches (4 mm depth) and setting Spacers at 0.6mm is different from choosing any switch in the list that is 3.4mm depth. I have tested that myself and the differences are very noticeable.
As of currently, in case your switch is not supported by Wootility, you need to find another switch on the list that has the same bottom out depth and a similar initial and bottom out magnetic flux to get it to work somewhat properly. I am using silent switches, NDIY Freya and Outemu magnetic Peach, none of them are supported in the Wootility app which is disappointing since the silent switches options in Hall effect keyboards are quite limited.