Since May 2022 Google has updated its billing system. And now we have multiple base plans and offers. It looks complicated and not so solid as it was before. Maybe it's more flexible, but a lot of questions arise and there is no good documentation for common cases. For example:
How to create a subscription, when at first user has a free trial and after trial user is billed for subscription. After that subscription is renewed automatically and user is billed in advance for new period. (X days trial->user is billed->Y days subscription->user is billed->Y days subscription)
This case was really easy to setup on previous version of Google Play Billing, but now it's not obvious.
Thanks everyone in advance.