OK i found the solution.

After activating developer mode.

In form view of the opportunities, i select the "Edit FormView" (on the upper left of the screen)

I replace

<field name="stage_id" widget="statusbar" clickable="True"/>

By

<field name="stage_id" widget="statusbar" clickable="True" domain="['&', '|', ('case_default', '=', True), ('section_ids', '=', section_id), '|', ('type', '=', type), ('type', '=', 'both')]" on_change="onchange_stage_id(stage_id)"/>

I get an error with the full code but it seems to work only with

<field name="stage_id" widget="statusbar" clickable="True" domain="[ '|', ('type', '=', type), ('type', '=', 'both')]" on_change="onchange_stage_id(stage_id)"/>

Is there any error in '&', '|', ('case_default', '=', True), ('section_ids', '=', section_id),