SRP in Tournament, Question about floating with A-high

I ran into an annoying spot that made me realize I had no idea how to navigate — interested in learning about this sub’s opinion on how to play it.

$300 buy-in 200K GTD live tournament, towards the end of Day 1. Top 10 advance to Day 2 and there are 23 players left.

We are 8 handed — I’ve got 165k as the effective stack at 3k/6k/6k level

Dealt A6dd in UTG+1 and decide to open to 2bb as the table has tightened up with the bubble on horizon (perhaps this is the first mistake, and I should just fold that hand)

Only the BB calls. Earlier I peeped his name on the players card and searched Hendon Mob — over $2 mil in earnings, looked and acted like a studied player.

Flop 773 rainbow, one diamond

BB checks, I check back

Turn 9 completing the rainbow

BB now leads for exactly pot sized bet.

This is where I realized that I’m clueless. From range perspective, BB has more random 7s than me, and realistically I only have A7s and maybe 87s. I’m also likely to have more 99 than him, however not sure if raising over his pot sized bet when actually having the 99 is credible. I thought about floating with Ace high, however the prospect of facing a massive river bet lead to a quick fold. I tried assigning some bluffs to him like T8o, JTo, J8o, but didn’t have it in me to face a big river decision with just Ace high.

Am I overthinking this, or it’s just a rudimentary fold?