Hi Lyubo, welcome to Community!
This is currently possible! We've been rolling this out to everyone and if it's not currently available to you, it will be by the end of this week.
Assigning issues from Slack is quite simple once you've got notifications flowing in to a channel!
You can also Transition or Watch issues from the action menu as well.
Atlassian's marketplace partners have had a very productive start to 2021! Since our last roundup, our developer community has added over 160 new cloud apps to the Atlassian Marketplace to help you...
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