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Legislation about transmit power in 2.4GHz band (SX1280)

Hi,
We want to use a 2.4GHz semtech module (SX1280).
We would need a useful 10Kb / s bit rate for a range (distance) greater than 3km.
The first tests show that it is possible to achieve this range in an open field with your SX1280 evaluation board. Integrated in our product, this distance will be probably inferior to the 3km. We could certainly go further by increasing the transmission power, but that depends on the legislation of the countries. In France, a priori the power emitted should not exceed 10 mW: could you confirm this point whatever the frequency used in the 2.4GHz band?
Thank you for your help.
Regards.