Is this a Rex begonia? The website I bought it from only had the name “begonia pancake” and no other information. If so did I cover its roots correctly? (pic 5 and 6)

Is this a Rex begonia? The website I bought it from only had the name “begonia pancake” and no other information. If so did I cover its roots correctly? (pic 5 and 6)

by Bombyx–Mori