I was running into this issue. Various dependencies were causing my function deployment to fail. After a bit of digging I found that the peer-dependencies were not being included.
Adding this fixed my issue
"scripts": { ... "gcp-build": "npm i npm-install-peers" }, [checking the docs][1]. the `gcp-build` command allows us to perform a custom build step during the function build process.

[1]: https://cloud.google.com/functions/docs/writing/specifying-dependencies-nodejs

I was running into this issue. Various dependencies were causing my function deployment to fail. After a bit of digging I found that the peer-dependencies were not being included.
Adding this fixed my issue
"scripts": { ... "gcp-build": "npm i npm-install-peers" }, [checking the docs][1]. the `gcp-build` command allows us to perform a custom build step during the function build process.

[1]: https://cloud.google.com/functions/docs/writing/specifying-dependencies-nodejs