Hi @Guru22,
If you want only to get the current days events, I assume that you want the events that will start on today.
So I have made a simple test on my side and the flow is configured likes below.
The function used in the Filter array is:
@equals(formatdateTime(item()?['EventDate'],'yyyy-MM-dd'), formatDateTime(utcnow(),'yyyy-MM-dd'))
In the action Send an email, please make sure enable Yes for the Is HTML field.

Please take a try with it on your side.
Best regards,
Mabel Mao