FixedFloat shows a clearnet address on amboss, you can probably open directly .. but i'm sure you already tried that
have you tried LTN+ ? you can DM them directly if you haven't tried yet you might want to give it a shot

https://lightningnetwork.plus/nodes/037f990e61acee8a7697966afd29dd88f3b1f8a7b14d625c4f8742bd952003a590

https://lightningnetwork.plus/nodes/03a1f3afd646d77bdaf545cceaf079bab6057eae52c6319b63b5803d0989d6a72f