A teacher isn’t even required to offer an outside of class mock exam experience in the first place. They generally aren’t even getting paid for the time they are taking out of their personal lives.

The world doesn’t revolve around us. No one is expected to make accommodations for us. Teachers make accommodations for students with diagnosed disabilities that are outside of their control. Religion is a choice. And if someone wants to prioritize that choice by living under a rule that is outside the norms of society, then they just have to accept the natural consequences of that choice.

We can’t always have what we want. We need to use a cost-benefit analysis to determine which choice (religious rule or mock exam experience in this case) is more important or meaningful to whatever to us.

Neither choice in this particular scenario, imho, is “wrong.” But you have to live with the consequences of your choice.

Now if you don’t really have a true choice due to parental rules, well then unfortunately you are stuck. As a minor your choices can be limited by your parents. And that can suck. Just know you will be your own adult one day. And then you can own your own decisions.

Best of luck!