I need heredate method “get_taxes_after_fp” in js from POS – Odoo v17

I have the following problem, I have the get_taxes_after_fp method of js which is used to obtain some taxes

I have the following problem because when I do the following override I am having problems with the call of the “get_tax_ids_after_fiscal_position_pos” method since even though it returns the values ​​of the correct method it seems that the information is not reaching the method in js, I think it may be because I am not using await but it does not allow me to inherit the method, how can I make it bring data from a .py method

my method:
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result to console.log:
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i need heredate method in js