Hi LMartin1,
Thank you for the response and again, I'm sorry about the issue with the pen calibration of your Surface. If adjusting the Surface Pen pressure sensitivity through the Surface app did not help, please try running these steps below and see if the performance of your pen on the device improves:
1: Run Surface Diagnostic Toolkit
See: Fix common Surface problems using the Surface Diagnostic Toolkit (microsoft.com)
2: Check for Windows Update
Go to Windows Settings > Update & Security and select Check for updates
Make sure all updates need are installed including Optional updates
3: Update drivers and firmware
Check what is the current OS Build of your Windows version by going to Settings > System > About.
Go to Download driver and firmware for Surface, choose Surface Pro
Then click the link next to Surface Pro 7 then click Download on the next page.
Choose the .msi file that matches your current OS Build and click Next.
After downloading, run and install the .msi then Restart.
If still the issue persist, I suggest contacting support for options available and for further assistance. You may contact them through the numbers listed in Global Customer Service phone numbers (microsoft.com). You may also reach them through this page: Contact Us - Microsoft Support and use the details or entries given here: I need to talk to tech support - Microsoft Community.