Hi Thyago,
EXOS switches allow you to get DSCP as a matching condition, and you can take replace-dscp as an action that will replace DSCP value from the header with one from associated QoS profile, or replace-dscp-value can also be the action so it should be ok (I didn't play with it yet).
Please take a look below, you may find what matching criteria can be used (every single row shows compatible combinations.
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For further info, you might like to take a look at ACL chapter in EXOS User Guide:
https://documentation.extremenetworks.com/exos_22.5/EXOS_User_Guide_22_5.pdf
Hope that helps,
Tomasz