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Android bug report capturing
After reproducing the issue, press the volume up, volume down, and power button simultaneously. This will capture a bug report on your device in the “bug reports” directory. Attach the bug report  file to this issue.

Alternate method
After reproducing the issue, navigate to “developer settings”, ensure “USB debugging” is enabled, then enable “Bug report shortcut”.  Capture bug report by holding the power button and selecting the “Take bug report” option.

Screen capture of the issue
Press the volume down and power buttons simultaneously. The image will appear in your gallery. Attach the screenshot file to this issue.

NOTE : To avoid leaking private information, please share screenshots and bugreports only in Google Drive. Share files with android-bugreport@google.com and include only Google drive links in your bug.  Bug report attachments should not be included directly in issue reports.

I sent you the google drive links to the bug report and attached some screenshots of the process.
Number 2 is network settings when physical sim is active and number 4 is network settings when esim is active and physical sim is present in sim tray but is not detected

Hi, I'm having the same issue. I contacted Google Fi support and they gave me a manually switch Sims. It worked. To manually switch Sims
*#*#794824746#*#*
Not an ideal solution however it's a patch until they fix it.

Thanks for that code! Not ideal, but helpful!

Another way to switch is to, hit the plus button on mobile network, download Sim, it'll fail

Now turn on airplane and turn off airplane..

What if the Sim you are connected to is the esim not the physical sim?

Same issue on my Pixel 2 XL after upgrading from Android 9 to 10. The workaround dialer code works.

I am facing this issue as well. I had to manually to remove the physical SIM and reinsert it to get it working.

Same here.  This is a real and easy to reproduce issue.

I have the exact same issue. The other work around would be to unlock bootloader and downgrade to 9 or see if one of the 10 betas doesn't have the bug. I am seriously considering downgrading.

Same issue, just brutal and embarrassing

One more anecdote. Possibly out of date since this experience happened on Beta 2 in the second week of May.

The (physical) sim swaps did not help me, no matter how many times or in what order.

The only thing that worked for me was the dialer code that was provided by Fi support.

Same issue. Must eject and reinsert ATT sim after switching to Fi eSIM

I've been trying different solutions.  The only thing that works is to use the change sim code above.  Google, you need to fix this.

Please share the gdrive link as mentioned in comment #3.

NOTE : To avoid leaking private information, please share screenshots and bugreports only in Google Drive. Share files with android-bugreport@google.com and include only Google drive links in your bug.  Bug report attachments should not be included directly in issue reports.

Here are the links for the bug reports
https://drive.google.com/file/d/1a_3WWsJH8yDCL1YAB3NW05XfbfAuXFoG/view?usp=sharing
https://drive.google.com/file/d/1Ioljr_130s4x6bHA5He5ddxv_i2m9MDU/view?usp=sharing