Rodri is the best midfielder on the planet in a world in which a lot of players in this position are selling for 100m or close. So he's not really a fair standard.
Rice is one of the best tacklers in the world, has one of the best engines in the world, has enough technical ability to play in a possession based side, can impact the game in the final third (15 g+a in the league last year), strikes the ball well enough to take right footed set pieces for his club, has an excellent injury record, willingly follows any kind of tactical plan, and is universally viewed as an excellent teammate.
He's not a bad passer at all but he's not the guy you want to be picking the ball up from the CBs and progressing it forward by himself. In a functional club side he doesn't have to do that anyway, as he can just be paired with another midfielder with better progressive passing skills or put into a system in which a fullback inverts into midfield to share the load while the rest of the team has an actual clue how to progress the ball so it doesn't need to rest on a single midfield ball progresser anyway.
People who know ball rate this player. Two of the best managers in the world in Arteta and Guardiola wanted to spend 100m or close on him last summer. Tuchel almost certainly would have done the same if Bayern had the money. A few weeks ago Bernardo Silva did an interview and was asked what three (non-City) players in the world he would add to Portugal if he could and chose Mbappe, Rice, and Saliba. If that's not a 100m player in today's game, I don't know what would be.