Inverted obsidian "glowstone cluster"-like structures under lava oceans

Currently in the Nether Update, lava oceans are rather boring and don't offer anything at all of interest, unlike their Overworld counterparts. It would probably be a good idea to add something under there to incentivise exploration of the lava sea.

A good idea would to be to add structures underneath it, specifically one that looks like an upside-down glowstone cluster, which is made entirely out of glowing obsidian. As this block has been unobtainable in Bedrock Edition for almost a decade, and is threatened with removal, this could be a very good way to make it part of the game again - there would be a high risk to getting it, but when you do get it, you are rewarded with a light source which cannot be blown up or easily destroyed.