Sonys history with MP is not great.
The quality was pretty good , great even, like UC4, twisted metal,warhawk etc but none of them have been that popular or really catched the mp mindshare.a
I think Xbox fans tend to overestimate the popularity of Microsoft's multiplayer titles.
Halo Infinite
Most played Xbox Games - 5th
Steam - Current: 16,151 | 24 Hour Peak: 29,830
Forza Horizon 5
Most Played Xbox Games - 9th
Steam - Current: 13,112 | 24 Hour Peak: 15,814
Gears 5
Most Played Xbox Games - Out of the Top 50
Steam - Current: 356 | 24 Hour Peak: 383
Forza 7
Most Played Xbox Games - Out of the Top 50
Sea of Thieves
Most Played Xbox Games - 32rd
Steam - Current: 16,426 | 24 Hour Peak 17,133
Gears 5 - doesn't appear to be a huge multiplayer title. The game was released in September 2019 and there are games that were released before 2019 with a higher player count.
Sea of Thieves - How popular is this game on Xbox? This game tends to hover around 30 of the top Xbox Games played (you can check the time machine website). The core players appear to be on PC with a concurrent player count at around 16k on average.
Forza 7 - Forza Motorsports series are often niche, but Xbox fans want to make you believe that it's more popular than the Gran Turismo series and it's one of the top multiplayer Xbox games.
Forza Horizon 5 & Halo Infinite
These two games seem to be doing well on Xbox. However, Halo Infinite is not among the top shooting games on PC. Destiny, Rainbow Six Siege are performing better. Halo is considered one of the premier shooters out there, but the numbers tell us differently. Forza is at 15k concurrent players on Steam.
This also doesn't count the multiplayer titles that didn't succeed.
Grounded
Gears Tactics
Halo Wars 1
Halo Wars 2
Bleeding Edge
The point is, Xbox fans want you to believe that MS is putting out a lot of great MP games with a strong player base and that's simply not true. Sony hasn't put out much because most of their main studios were developing SP games and they're currently working on many MP games. The belief that many people have in here that it will be nearly impossible to make a successful MP title than the ones mentioned above is really funny.