Are you saying that the webinstaller is not working for you?
Which versions of Pixel phones do you have there to work on?
What is the browser you are using and my other question is where does the install fail?
Let me explain I just within the last half hour flashed a Pixel 6 via webinstaller but it failed upon obtaining the factory image for this phone. I presume it had to do with using Chromium browser on my HP Zbook with Windows 11 installed. I switched to just a plain fresh install of Brave browser and it went smooth from there on.