With Federal riding redistribution taking place in 2021 and 2022, @ksituan has been producing some maps for the potential changes.
Seat allocation changes, 2012-2022
General trending sub-provincial
If 2021 Census numbers line up with estimate population numbers there's potential for the HoC to increase from 338 to 342 seats, with the following breakdown for 2022:
Province...........Seats.....2022.....Change
Ontario ............121........122......+1
Quebec ............78..........76.......-2
British Columbia 42..........43........+1
Alberta .............34..........38.......+4
Manitoba ...........14.........14........--
Saskatchewan ....14..........14......--
Nova Scotia ........11.........11........--
New Brunswick ...10.........10........--
PEI ....................4...........4........--
Yukon ................1...........1........--
Northwest Terr ....1..........1........--
Nunavut .............1...........1........--
https://en.wikipedia.org/wiki/2022_C...redistribution
Within provinces, as mapped above, Brampton is due to receive the additional Ontario riding, likely with pieces of Mississauga-Malton pushed into Brampton. As it was noted on Twitter, Mississauga will not be receiving additional ridings and actually loses proportionally for the first time in forever because its growth does not outpace the province's average.
They produce a lot of great maps, so i'd recommend checking them out:
https://twitter.com/ksituan