Guilt over great paying office job where I feel paid to be available rather than paid to do X Y Z tasks

Basically I am a salaried supply chain analyst I just play in spreadsheets for part of the days. I don’t see or feel like I’m making many tangible impacts that justify my pay. I get all the work done for my deliverables which are maintaining spreadsheets and making some KPIs look good. Sending/answering some emails, occasional meetings, a lot of talk within the room with coworkers about various things going on. But if per se, I was asked to write exactly WHAT I actually am doing in physical terms of deliverables I feel like I don’t really do much. Sometimes I feel I am being “available” for 8 hours but not actually doing constant tasks for those 8 hours busy the whole time. My previous good pay salary job was like this too. My coworkers love me, I am going to be asking for more involvement in my performance review coming up not to excessively burden myself but just to feel less of a fraud. Is sending and waiting for email responses, helping coworkers with questions, actually “work”? I can’t really quantify what I do outside of a large file I maintain.

I think the root of it is in high school and college, I would work 50 hours a week landscaping. If I wasn’t working, I was eating or peeing. I knew immediately what the tasks were for the day, and would always feel a sense of accomplishment after the day ends because I saw all the tangible results. In the corporate office world, even though I’m not a manager, it’s like there’s more soft-skills kind of work that’s not always tangible grunt type of busy work tasks?

It just makes me feel guilty knowing there’s people working nonstop all day long for far less than I earn, just because I got knowledge and experience it still feels like I’m a fraud because I’m not actually WORKING any “harder” than all those other people.

I guess all the higher level managers and directors of companies would apply to this as well, I’m just overthinking everything because of the societal pressure to glorify workaholics always being busy and ambitious and constantly growing and doing endless amounts of things.