While I don't know for sure, I don't think so.
The Mosconi Cup is an independent event, not a WPA sanctioned event and may not be subject to the WADA drug testing guidelines, which were discussed at length on the forum during the Mario He incident leading up to the 2018 Mosconi.
Austrian Mario He, who had qualified for Team Europe in the 2018 Mosconi Cup, had been found to be in violation of WADA rules, which apply to the WPA sanctioned Eurotour. and faced a suspension. It should be remembered that Matchroom did not move, in any way, to disallow Mario's participation in the 2018 Mosconi Cup, but Mario chose to disqualify himself.
Others on the forum may have a deeper understanding of this subject than me, and perhaps they will chime in with their thoughts.