1-Go to your odoo installation folder where you will find odoo-bin
ex : cd /opt/odoo15/odoo
Switch to odoo user
sudo su odoo
Execute the command
python3 odoo-bin shell -d dbname --addons-path=/opt/odoo15/custom-adons1,/opt/odoo15/customadons
then odoo will start in terminal then issue the command
self.env['ir.module.module'].search([('name', '=', 'module_name')]).button_immediate_uninstall()"
if the command fails try
self.env['ir.module.module'].search([('name', '=', 'module_name')]).button_immediate_uninstall()"
Thanks for Muhammad Awais from odoo forum.