Can I be a SHARP and an EO rep at the same time?

I was an EOL and just went to SHARP. I was told by the instructors at SHARP that I could not fill both roles but I don't know if it's regulatory or a recommendation.

As long as it is an additional duty you can serve both roles. If you serve either in a full-time position, you won’t be able to do both. I’m currently a SARC at the Installation level at Fort Gordon. As a full-time SARC or full-time Victim Advocate, you cannot have any other additional duties duty to having to be available at all times. To serve as a SARC, you have to be an E-7, so you’ll have to serve as a Victim Advocate as an additional duty. I hope this helps

you must be a SFC or up to be an EOA. As a SSG you can go to EOL school which I did last year it is just an additional duty unlike EOA which is an actual Billet. Sharp program is a totally different beast. I know being a SARC is a battalion level or higher I don't know the specifics on it off the top of my head.
AR 600-20 a good website also https://usacac.army.mil/schools-and-centers/sharp-academy/crsdescription
You can also search ATTRS for course requirements.