Which exchanges or wallets offer the option to open a channel with a Lightning routing node they operate at the time of writing (June 2023)? (I know Lightning Labs' Pool and liquidity ads attempt to provide a solution to the inbound capacity problem but for now I'm just interested in outbound capacity.)
Of those that do are there any particular requirements (e.g. minimum channel capacity, uptime requirement)?
I understand that I could speculatively try Lightning nodes from 1ML or Amboss but I'm capital and time constrained.
Also any exchanges or wallets offer the option to open signet channels with them at the time of writing?