I have some collections in my pc but in my mobile (Android), cant access that.
1Password Version: 7.9.2Extension Version: Not ProvidedOS Version: 11
Collections are a feature of 1Password 8. So, they will not show up for 1Password 7. We are currently working on 1Password 8 for Android, but we don't have a release date for it yet.
You can join the beta program to get early access to features. However, we have not started early access on 1Password 8 for Android yet. We will announce early access and the stable release of 1Password 8 on the https://blog.1password.com/1Password Blog.