IBKR itm call expiration.

Buenos nachos everyone,

Recently started iNveStIng and TrAdiNg and i know very little about everything so i decided to buy some calls last week (this sentence is dope).
Actually paid off, made some 400$ which for me is ok, not planing on getting rich, just getting some extra cash.

Anyway, i have a few questions :
What happens to expired ITM calls on IBKR if i dont have the cash avail to exercise? (Non margin account).

Shouldnt the profit from selling the option be at least the same amount as exercising and selling the stock?

I had 10x 0.30 calls expiring friday, ibkr calculated a profit of around 300$.
Doing my caveman math, i determined it was the profit of exercising then selling.
However the cost of the option itself was 0.55 at that time. So by the same caveman math, some 255$ profit.
Was the app slow to update ?
I had cash to exercise 3 options so i thought id cycle the money (exsrcise – sell – exercise).
But the exercise order was not filled for a few hrs so i gave up and sold the options for non optimal price. Still ok with my decision but still…
Anything else i should generally know about exercising/selling ?
Made an inquiry to ibkr but they havent responded over the weekend.

Thanks