Integration of Yandex Calendar in Jira (time slots)?

Question

Calendar

Good day, please help!
The bottom line: there is a Yandex Calendar of a certain working group, which displays planned tasks at certain time intervals. In Jira, when creating a task, you need to add the "free time interval of the group" field, when saving, this task is also added and displayed in the Y.Calendar for the specified time.
I saw something similar here , although there is a paid calendar in Jira itself.
Please suggest a tool/plugin/tip/etc to implement this, thanks!