A 10-minute cameo for the win at Crystal Palace has been the only involvement the Italian has had since football's resumption.
"A good professional will be unhappy that they're not playing but will deal with it in the right way, which he has done," said Lampard of the 28-year-old.
"In my job, you have to understand that every individual is different and I try to deal with them as I feel our relationship is individually.
"I can see sometimes in a player's face that they've got the hump but that's the nature of my job. There are 11 places for a squad of 20-odd players so I can't keep everybody happy all the time. I don't mind an unhappy face.
"I have to accept in my job that I see that but at the same time we want professionalism and players to act the right way. Jorginho has absolutely done that so for that I'm delighted with him and it says a lot about him. Of course, he's a top-class player - there's no doubt about that."
He added: "With Jorginho, he's been a big influence for us this season but I have to make choices and they're not easy choices.
"He knows I'm always ready to talk - I've got a really good relationship that's very open with him and where he's trained well and shown the right character, we haven't had to have many sit-downs. I know that I can rely on Jorginho at any moment.
"I can rely on him to drive the team and be the one in training that wants to win a small-sided game as much, if not more, than everyone else so in that way he's a fantastic player to manage."