I used the search but could not find any concrete answer.
All i found was information about skills until rank 6 that you can use while mounted .
Thank you.
On tosbase.com nów the description of the skill has an icon showing if it dismounts on using it or not
There are some skills that can be used while mounted that are not stated.
EG: Swordsman - Bash, Peltasta - Umbo Blow, Rim Blow, Hoplite - Pierce, Stabbing, ETC