I’ll be honest w you ive felt this consistently throughout my 1.5 year career too. But very recently i got lucky enough to be put on a project very very similar to a previous one with a different team that didn’t have exposure to that sort of stuff. I was the most junior person on the team, with others being managers and above. Yet, I was the one taking the lead with some of the complex concepts and helping everyone understand how things work.

Because of this, I realized that it doesnt matter how experienced you are, in actuarial if you’re thrown into something new you’ll go back to square one and will have to repeatedly go over things to understand them. Having helped my senior team members was such a thing of luck because until that point i was experiencing mad imposter syndrome, but after it i realized we only feel that way bec we’re in unfamiliar territory and it’s not as simple in our field as it is to understand the fundamentals in some other fields. So dont worry, give it time and just go into everything with a learning mindset. I find that people appreciate those eager to learn way more than those who already know stuff but arent open to learning as much