Ultra fast transaction submission?

I noticed there are transactions that got submitted too fast. For instance, I was tracking token activities and noticed there are token buys that are landed right into the next block after the mint!

I presume these are bots, but even in that scenario, how do they manage to submit transactions so fast?

When inspecting via solscan, I see almost all of them spam the network, tho even doing so, getting buy tx landed in the next block should be tough.

Another thing that comes to my mind is perhaps they send directly to leader’s TPU, but afaik validators primarily accept transactions from high-staked validators.

Thoughts?