I went cheap on a channel open tx fee. By umbrel Thunderhub.
It's been about 2 days, it's stucked.
I don't use Umbrel Thunderhub. But try to check whether option to increase fee rate is possible.
Impossible. It's either,
1. Your TX will be confirmed later.
2. Your TX dropped by most node (after 14 days or purged due to many TX with higher fee rate), which is equal with never sending your BTC in first place.