What do you mean "approved of the deal"? What major players have came out and said they agree? No one, that is who. Of course, other countries including Somalia were already aware of the deal but doesn't mean it will go through since there is alot of red tape involved. The part about Somaliland leaving Mogadishu's sphere of influence is also bogus. It hasn't been apart of that sphere for 30(!) years because FGS has next to no control over Somaliland, they are only apart of Somalia in name only.
Yes, they absolutely do want a seat in the UN, that is realistically the only way for them to be a real country which is their entire goal in the first place. Printing your own currency, flag, passport ect. doesn't make you a real country, only a pretend one like the Principality of Sealand. You need legitamacy which can only be attained through the UN. There are exceptions like Taiwan but unlike that country, it has nothing to offer to the world and is extremely poor.