Your manager is not an idiot. They generally can tell who is failing to deliver because they are constantly stuck on trivial things and who genuinely can’t do

Your manager is not an idiot. They generally can tell who is failing to deliver because they are constantly stuck on trivial things and who genuinely can’t do more and need help. If you go see your manager because the team next door is blocking you explaining clearly what you have tried and why you need the issue to be escalated you just sound professional. Same thing if you can tell you are going to be late in your delivery and need something specific done to help especially if you do it with a lot of time left. Also I have a pro-tip. Managers intentionally ask people they view as competent and trustworthy to do the thorny things that need to get done. So surprisingly the people who are expected to need the most help are often the most valued.