What is the daily limit for generating images on Copilot for an M365 Premium account holder?

When Microsoft decided to restrict the number of image generations using Copilot, I was led to believe that Premium account holders get a 'more generous' allowance, and even spotted the word 'unrestricted' in some other explanatory text about the benefits of being a Premium subscriber.

Since signing up to Premium, my Copilot image generation usage limit has not increased, which is especially annoying when Copilot doesn't get a render quite right, meaning I have to issue further instructions. It can take several attempts to obtain an image that fits my vision, which also clocks up the number for the day, eventually leading to a message that I'll have to resume the same time the next day.

By the way, my instructions are clear enough, but occasionally Copilot misinterpets, or even ignores some instructions, forcing me to start over.

My complaint is that I don't expect to get restricted to a dozen image generations per day after signing up to a package that clearly stated I would get more than a basic subscriber. I used up an entire day's 'allowance' just trying to get one image right... and it still needs work, but it'll have to wait!!!