@Quick_Shifter is right, but I feel like he's skipping some nuance because he's an expert so takes things for granted that bite us amateurs.
Do some research and look at people running true 35's on YT. It's tight, and most say "I never offroad" -- yeah, because serious articulation would be rubbing.
I went with BFG KO2's which are technically 34.5" to buy a little room. Leveled with Bilstein 5100's. They still rubbed at full lock -- not really full, just before. I find any rubbing annoying, and want as much extra room as possible to be able to hit a trail once in awhile (probably should have just used a real lift kit, but then my wife would divorce me vs just giving me side eye).
It's not a hard fix. I removed the stupid front mudflap things (can't even tell it's missing from the side). Trimmed some of the wheel liner plastic, and reshaped it a bit with a heat gun (go slow, wear gloves, not hard, it's thermoplastic). Also paranoid and wanted as much room as possible, so took a grinder and rounded off the area around the pinch weld then spray painted everything black. This is the one step that's not 100% necessary IMO, but it looks fine if smoothed out (doesn't get all the way into the weld or impact the bolts) and gives you a little more room.
This was my experience getting "almost 35's" on a 2021 Rebel. YMMV. I have the worst luck.
Overall, I think it's worth it...wanted to level anyway, and the extra 1.5" of axle height is nice too.
Let us know how it turns out!