If I'm not mistaken, the "Jansen is likely to be traded" rumor was started by a daily Blue Jays podcast which presents other people's mock trade ideas as if they're legitimately in play (rarely ever true). They were also a big part of the "Acuna is getting traded to the Jays" rumors from a couple weeks ago, which Rosenthal finally shot down. To date, no Jays reporter has officially reported that Jansen is the one most likely to be moved - it's purely speculative. Most on-record quotes from the Jays front office coyly hint that all three catchers could be in play or that Toronto might keep all three.
Worth noting...
Gabriel Moreno will be 23 next season, on pace to reach free agency in 2028, and will earn $0.7M.
Alejandro Kirk will be 24 next season, on pace to reach free agency in 2027, and will earn $0.7M.
Danny Jansen will be 28 next season, on pace to reach free agency in 2025, and will earn $3.6M.
Moreno is the total package & will likely be used to bring back a star if he's moved at all... but I'd personally rather see the Twins target 22-year-old catcher Endy Rodriguez of the Pirates before he has a chance to breakout & become off-limits. A David Bednar+Rodriguez trade would be tough to pull off but would address two of the Twins' needs in one move. Twins likely don't have enough of the right assets to execute it, but the offseason is all about wishful thinking.