I'm fairly certain that the RNGs do not produce a static deck that deals the cards out from a predetermined order. It would make sense for the deck to be in a state of constant shuffle even while a game/hand is being played.
The RNG system basically randomly deals a card from the available cards not previously dealt. There is likely no "deck".
My assumption is based that using a continuous shuffle, or random selection from the cards yet to be dealt, would increase the level of entropy and reduce any risk of a person being able to "hack" the deck to see what card is next to be dealt.
It's likely the RNG simply randomly selects any card from the available cards, and deals that card next.
There are no burn cards. There is no cutting of the deck. There isn't even a "shuffle" per se.
The cards are chosen at random starting from the 52 cards, and dealt out to the players and board. Once a card has been dealt, it's no longer available for the RNG to select.