The IPL used to consist of 8 clubs - but as from 2022 it will be extended to 10 Clubs - in one of which as I understand it Manchester United have a major share.
However, the 8 clubs can retain a maximum of four players of which not more than three can be Indian players and the maximum for foreign players can be between 1 and 3 players.
So far only 1 player from SA retained by Delhi Capitals is Anrich Nortje. Nortje two years ago was contracted by that Club at a rate of 75 000 rupees and his salary must have gone up massively in 2021. He was retained by Delhi for the next three years at a rate of 6,5 crores - that represents a salary of over US$ 1 million for the IPL 2022. Fact is that Rabada was not retained by that Club - his performances in 2021 was substandard
The two new clubs will have the option to select 3 players before the annual super sale of players takes place. Those 3 players will be announced by 25 December 2021. There may be some SA players in that category - four of which could include Markram, Rabada, De Kock and Van der Dussen - but at this stage it is guesswork at best.
Neither Smith nor Warner was retained by their clubs and would be up for sale in 2022 . .