I would say AOC has a very emphasized presence in media that often allows her to break through into headlines despite corporate media's tendency to never cover anything good a Democrat does ever and instead push this narrative that 'if Democrats can't manage to pass some legislation it's Democrats fault for not doing enough and if Republicans do something awful it's Democrats fault for not stopping them.' The stereotype goes if Democrats hold rallies across all 50 states it's radio silence, but if Trump breathes it gets 24/7 news coverage at work to normalize him, etc.

To be honest I'm a bit guilty of this too. I don't actively search for what members of Congress are saying/doing, and I originally only watched AOC's video because it was being shared around on social media. That being said, I decided to search around a bit to see what members of Congress are saying:

• Here's Bernie Sander's YouTube, he's been talking about oligarchs lately
• Ilhan Omar saying Trumps executive orders don't have support from GOP in Congress on CBS News
• Ayanna Pressley at a rally speaking out against Musk
• Plently of complaining from inside the halls of Congress like from Greg Casar

TL;DR: I would say AOC is probably the best at messaging directly to the people, and perhaps other members of Congress aren't quite as effective as her, but a lot of them are still doing something even if we don't always hear about it