Fast option in eth_sendPrivateTransaction doesn't work

[amit-davidson]

Describe the bug
Hopefully, this is the right repository. I also didn't get attention in the discord channel.
According to the docs, to eth_sendPrivateTransaction there's an option to specify the "fast" option. I specified this in the request but it's not working.

I'm not sure if I'm actually supposed to be there or not, but it's really confusing. This parameter is also supported in: https://github.com/metachris/flashbotsrpc/blob/master/types.go#L435. This package is used by flashbots here: https://github.com/flashbots/rpc-endpoint/blob/main/server/request_processor.go#L312, but all the builders are fetched instead of specifying fast to the RPC which makes me think even more that it's a bug and this option shouldn't appear in the docs.

Screenshots