At the moment it's really hard to search for a NFT and buy it, because a grouped NFT doesn't have a buy option. so at the moment you need go to the NFT hodlers tab and search one by one for specific NFT #id who listed for sale.
It would be better if we had a Buy button on the Groupd NFT tab, and have all of the ids who's listed for sale with the prices, just like it's in FT(Image attached).