Were you using a custom DTH (device handler) for it, or a stock SmartThings handler?
If it was custom, then it’s likely not adding because ST has moved away from Groovy based handlers to Edge drivers and there’s no Edge driver available, or the “fingerprint” of that controller isn’t found in an Edge driver provided by SmartThings.
@Mariano_Colmenarejo may have an Edge driver that will work for you though: