Lost Access to Dragonflight Dungeons

Hi all! I was a WoW enthusiast around 10 ish years ago, and I’ve finally decided to return. I have all the expansions up to Dragonflight. So much has changed over the years, and I’m catching up. Having a great time levelling an Evoker and completing the DF Campaign…however, I decided to buy The War Within expansion as I was enjoying myself so much. Afterwards, I lost all access to literally any other dungeon (via group finder) except for the first WW one (I can’t remember the name, but the level is 71-80). It means I can’t complete DF Dungeon related quests unless I want to solo them.

Has anyone got any advice on this? I think I’m missing something crucial here, and it’s been such a long time since I’ve been properly into WoW, I wouldn’t even know where to look (I’ve Googled it and can’t find anything either). If I had known I would’ve lost access to dungeons, I wouldn’t have bought the expansion, and I’m rethinking purchasing future releases.

Please be kind! I know I’m a noob! I’m 24 now and although I’ve checked my account over the years, I still remember grinding “Glory of the Ulduar Raider” and other achievements at 14 :)

Thank you for any help<3