There's a way to know how much i am spending/going to spend with Amazon S3?

I have several TB of borg backups. Uploaded them on backblaze b2. I could immediately see how much resources i was using, how many api calls, and so on. Very easy to see and predict the next bill. I can see exactly which bucket uses more resource, and which is growing over time.

Because I'm cheap, I want to upload those files on aws glacier, which theoretically costs a quarter of b2 for storage, but API calls are extremely expensive. So I want to know the details. I won't like to get a bill with $5 in storage and $500 in API calls.

Uploaded a backup, but nowhere in AWS I can see how much resources i am using, how much I'm going to pay, how many API calls, how much the user XYZ spent, and so on.

It looks like it's designed for an approach like "just use our product freely, don't worry about pricing, it's a problem for the financial department of your company".

In AWS console I found "s3 storage lens", but it says i need to delegate the access to someone else because reasons. Tried to create another user in my 1-user org, but after wasting 2 hours I wasn't able to find a way to add those permissions.

Tried to create a dashboard in "AWS cost explorer" but all the indicators are null or zero.

So, how can I see how many API calls and storage is used, to predict the final bill? Or the only way is to pray and wait the end of the month and hopefully there everything it's itemized in detail?