I have done work for other companies in engineering roles that produce access control systems.
So there are two answers.
1. If it's not documented, no. It doesn't work.
2. Even given item 1, it is often possible to engineer a solution but this can be costly to the tune of 6 or 7 figures today. You end up working with one or both companies and they make a custom system for your needs.
Am kindly inquiring that is it possible for the connection between HIK access control terminals and Bosch access Easy Controller v2.1
Thanks and kind regards