@m-azzain
i think its not that i need, i want to add in 'maintenance.team'  a field (many2many - available stages), and when i chooce for example columns "new", "in work", "ended", i want, that kanban show me just this columns for team, where i choose it. But problem is that kanban shows all available stages from that many2many field and i dont know, how to hide it.

in app "project" its already realized, for each project you can choose used stages, but i cant find it in code. Maybe this is some of js script there, i dont know.

If I am correct the stage_id is in 'maintenance.request' and 'maintenance.request' is in 'maintenance.team'
If that the case, I think the problem is about how are you grouping your data
That is when you try to group the teams by stages you will end up with same team appear in many stages, because it has different requests in these stages.

but if you still want to group your team by this way, you need to have a stages field in the team model so that you used it for grouping

stages = fields.Many2many('practice.maintenance.stage', compute='_compute_team_stages', store=True)

@api.depends('request_ids.stage_id')
def _compute_team_stages(self):
    for team in self:
        team.stages = team.request_ids.stage_id

With regard to the kanban view you can use the above defined field(stages) as a value for default_group_by so that kanban will use it for grouping by default. or you can put it in the search view as a filter in the group tag.

kanban will display whatever grouping you provide, so if you have multiple groups you can define all of them in the search view