I am new to Supabase. Just now migrated from Firebase. As i am trying it out on free plan. I saw that unwanted egress data is seen in the Supabase console its way more than the amount of data i have in my database. Please help me out here

You need to provide more info. It is not clear what egress (http data leaving your instance) has to do with the amount of data in the database. You could have 1 row and access it 100k times and have alot more egress than database size.