Hi,

Here you can use the '_order ' attribute of odoo which is used to sort the recordset in list view either in ascending or descending. 

Go to the class definition python code of your co-model of the One2many field, there we can set the attributes _name, _description, _rec_name, etc. Like that, _order can also be given as

_order = "sequence"

If you want to sort in descending order, give

_order = "sequence desc"

Regards