It looks like BA/Comair starts flying this at the end of March.
Results from https://www.ExpertFlyer.com
Code:
Flight Timetables Search:
Search JNB to WDH on 03/20/22 up to 7 days
Flight Stops Depart Arrive Aircraft Duration Frequency Effective Ending
4Z 120 0 JNB 6:30 AM WDH 8:45 AM E90 2 hrs 15 mins M,T,W,Th,F,Sa 03/19/22 04/01/22
4Z 124 0 JNB 10:40 AM WDH 12:50 PM E90 2 hrs 10 mins Daily 12/03/21 10/29/22
BA 6275 0 JNB 12:20 PM WDH 2:20 PM 738 2 hrs 0 mins Daily 03/27/22 12/16/22
4Z 126 0 JNB 3:00 PM WDH 5:10 PM E90 2 hrs 10 mins M,T,W,Th,F,Su 12/03/21 12/16/22