Hello, Giovanni Nunes de Souza.
Welcome to Microsoft Community!
I've noticed that you're using another stylus in place of the Surface Pen and are experiencing functionality that is not being applied properly.
First of all, I don't know the exact model of your stylus, and it's difficult to guarantee that a stylus other than the Surface Pen will work perfectly with a Surface device.
You are trying to make adjustments using the Digitiser Calibration Tool, but when you are asked “Do you want to allow this application to change your device?” and click yes, there is no response. and after clicking yes, nothing changes. This may be due to the fact that the Digitiser Calibration Tool is not recognizing the corresponding Surface Pen.
I would recommend that you first perform a simple check of your device using the Surface Diagnostic Toolkit:
Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support
Observe your Surface Pro 7 for any malfunctions.
Also, you can try updating your Surface Pro 7 drivers and firmware to troubleshoot potential driver issues and maintain device performance:
Download Surface Pro 7 Drivers and Firmware from Official Microsoft Download Center
Please reboot your device after the download is complete to apply the update.
Next, you can ask a family member or friend if they have an extra Surface Pen that can help you with the test.
If the other Surface Pen works perfectly on this Surface Pro 7, there is some fault or compatibility issue with your other stylus.
(You can also bring your device to the nearest Microsoft store and after speaking with a staff member, I'm sure they can provide you with testing conditions)
If you find that other Surface Pens are also not working on the Surface Pro 7, then we need to troubleshoot this Surface Pro 7 at the hardware level.
You can get in touch with Surface support via the Surface App and I will share the following steps with you:
I will share with you the steps to reach out to support via Surface App:
1. You can open the app by typing Surface App in the taskbar search box.
2. Click on Help & Support on the right side and click on Get Help.
3. Enter the specific problem you are experiencing in the box (Surface Pen won't work) and click Contact Support below.
4. On the next screen, select “Technical Support” from the Service category.
5. Next, you can choose your contact information and time, and a Surface support person will contact you.
I wish you all the best.
Best Regards.
Leo.L - Microsoft Community Support Specialist