So here's my view on things: First off, Boba is full of crap. He's a BAD GUY, and we will see it soon.
- He's worked for the Empire before.
- He probably STILL hates the Jedi. Why would he possibly help Grogu?
- Jango's line about being a "simple man making his way in the universe" was a lie to Obi-Wan. It's repeated here.
- They took out the Razor Crest from orbit, but they didn't blow up Slave I.
- He had little compunction about burgling the Razor Crest. Admittedly he was getting his own stuff, but still.
- Boba made it sound like Jango was his real father, and didn't bring up that he's a clone. (That's a stretch, but it goes to Boba's dishonesty.)
- Either he could follow the Imperial tracking signal, or he was tipped off to where they were going.
- Jango wasn't a Mandalorian, according to the PM of Mandalore. Okay, maybe he was a foundling who took the Oath like Din did. But it's likely he's just a bounty hunter.
- Boba's new chompers were like the guy from There's Something About Mary, and those were done to be dishonest. ( I kid, I kid.)