Hitman 3 is having issues with bringing in progress from previous games
IO says it's hard at work on the problem

Hitman 3 is live, but players are having trouble bringing their progress from previous games forward before they can start playing.
Even more than most sequels, Hitman 3 is meant to be deeply tied to the games that came before it - you can import the levels from the earlier games if you own them on the same platform (though the studio is still working on a solution for moving from Steam to Epic Games Store). That includes carrying over your progress, item unlocks, and statistics via your IO Interactive account. Unfortunately, that account service is getting hit hard by early Hitman 3 players right now.
We're hard at work on getting IOI Account back online to enable progression carryover. We'll tell you when it's fully operational again. Please press F5 on Twitter instead of our site. We want it back up and running just as much as you do. Thanks! pic.twitter.com/4St0a2hYtQJanuary 20, 2021
For the time being, it seems nearly impossible to complete the process of migrating your progress into Hitman 3. You could always just wait to do it later, but there's one big problem with that idea as indicated by IO Interactive's pre-launch guide: "If you have already started playing Hitman 3 and then choose to perform the progression carryover process, you will lose all progression earned within Hitman 3 up to that point. We recommend you carryover progress before starting Hitman 3."
So you really shouldn't skip carrying over your progress into Hitman 3 for now unless a) you don't care about that old stuff or b) you just want to start assassinating targets ASAP and don't mind having to do it all over once your IOI account is back online.
Hitman 3 kicks off a big year - see what else we're looking forward to with our guide to new games 2021.
Sign up to the 12DOVE Newsletter
Weekly digests, tales from the communities you love, and more
I got a BA in journalism from Central Michigan University - though the best education I received there was from CM Life, its student-run newspaper. Long before that, I started pursuing my degree in video games by bugging my older brother to let me play Zelda on the Super Nintendo. I've previously been a news intern for GameSpot, a news writer for CVG, and now I'm a staff writer here at GamesRadar.

Valve leads considered making a "mediocre" game before Half-Life to build the team up, but original marketing exec said "if you do that, the company will fail"

Take-Two won't begin marketing GTA 6 until it's closer to release: "The anticipation for this title may be the greatest anticipation I've ever seen for any entertainment property"

After nearly 40 years of waiting, Atomfall is the Doctor Who game I've always wanted