Both players were late joining up with the squad as they were busy finalising moves to Manchester United and Liverpool respectively and Pearce is not surprised by how in demand the youngsters were.
Pearce told Sky Sports News: "If I put myself in their position I would want a deal tied up before I went to a major championship. I wouldn't want to be worrying about it while I'm at the championship and I think that was their mentality as well.
"So they've got those deals all signed and sealed. They were with us last night, then back on the training pitch today with no problems at all and we're pleased for them.
"They are extremely talented players so I'm not surprised that clubs are looking to vie for their services."
The Under-21s boss also revealed he had no intention of stopping the deals from going through before the tournament and he admitted he did not know a great deal about either transfer.
"I've got no interest really, I know the players are back with us, they're quite happy. I've no idea, I've not spoken to them in depth about what's gone on or what hasn't gone on at individual clubs.
"We were happy for them to go with their representatives to speak to various clubs, wherever they've been and it's not really my business.
"So what we do know is they're back, they're focused with us and they've got a concentration and a focus for the Under 21s."