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Hello. I read and I think I know how lightning network liquidity works.
I think I DO have incoming liquidity because
  1. I used this channel to send currently total around 1200 sats.
  2. When I open my channel, I can see under "Channel balance" -> "Inbound" it says "1200 sats"
Keep in mind that I tried to receive 1000 sats, then 100 sats, then 1 sat. All attempts failed. I tried the same with the app open on the foreground.