Only rounds display price about m2.price HOT 2 CLOSED

Really magento does not use reverse conversion. Instead, the magento conducts two calculation processes, the first for the base currency, the second for the store currency.
Look at the quote_item, quote and etc tables and you will see pairs of fields subtotal and base_subtotal, price and base_price, discount_amount and base_discount_amount ...
Depending on the situation, the system uses the necessary(base or store) price.
Changing this logic requires a strong intervention in the core of the system. It's easier to just delete the string 'Your credit card will be charged for $10' (so as not to mislead the buyer), transfer total in the store currency(£8) to the payment gateway and delegate gateway the final conversion process (here you can see the amount of $10.14).

from m2.price.

A good workaround in the general case.

Sadly the reason I'm using this module is because the payment gateway does not support payment in the viewed currency (in this case AED - very few support it directly).

from m2.price.