How to deploy PHP applications to GoogleAppEngine via GIT push?

Question

PHP

Hello!
Question - I can't figure out if it's possible to deploy PHP applications to GoogleAppEngine via GIT push?
At the moment, I can push sources to BitBucket to the master branch, they also appear in the Google Sources Console, the pipeline for automatic deployment is set up, but it doesn’t work, and it’s not clear how to debug this process ..
Deploying the application directly through the Google App Engine Launcher works fine.
The manual says that push-to-deployd is supported only by Java, Python and Go, at the same time, there are no StackOverFlow posts where, as I understand it, it works on PHP as well, or is this already irrelevant?
Piplan is configured directly without Jenkins by itself.
I asked on StackOverFlow - they are silent, maybe they actually had a stack overflow)
I need this in particular for auto-deployment from a web ide using git technology.
Maybe there are alternative solutions?
Also along the way, a related question - I decided to use GAE in my web projects because of the need to provide access for Google users to their resources (convenience and security of authorization / access to API / cloud services, ease of payment, etc.) but there are a lot of other problems that are not present in the traditional Apache model, in particular, Spanish did not work out that way. Google Storage for images that are uploaded via Javascript and many other nuances (need to generate YAML, deploy, it's not so easy to immediately use various frameworks and other tasks that arise constantly and take a lot of time) - the question is if I will authorize my users using Google OAuth 2.0 is it possible to access GoogleApi just as if it were a GAE application (authorization, access to mail, user disk, etc.)?
I saw that a GAE application is also being created for Google OAuth, but as I understand it, it simply performs a layer for authorization and it does not affect the operation of traditional web applications on Apaches.
I hope I explained it clearly :) I
'll clarify that we are talking about an intra-corporate application.
Thanks in advance for your constructive responses to both questions!