Hello NndnG,
Greetings! Thank you for posting in Microsoft Community. We are happy to help you.
May I know if you want to freeze first 2 rows and first 2 columns in your Excel sheet?
If I misunderstood, please feel free to correct me.
If you need to freeze first 2 rows and first 2 columns, you may try steps below:
- Firstly, ensure you don't already have panes frozen. Go to View tab > Freeze panes > click UnFreeze panes from the dropdown.
- Then select the cell C3. Then select View tab > Freeze Panes > select Freeze panes from the dropdown.
Here is a screenshot for reference: 
By the way, if you need to freeze first 2 rows and first 1 column, you may try steps below:
- Select the cell B3. Then select View tab > Freeze Panes > select Freeze panes from the dropdown.
Here is a screenshot for your reference:

I look forward to hearing from you;
If my understanding of the scenario is not consistent with yours, feel free to point it out, I will continue helping you.
Thanks for your time and cooperation.
Happy new year in advance! I hope that you are keeping safe and well!
Sincerely,
Tina | Microsoft Community Moderator