Jones came in as a scrum consultant for the tournament after being given permission by his Harlequins club.
The Wales scrum impressed against Ireland with props Nicky Smith and WillGriff John given starts.
Jones says he was shocked Smith, who joined Leicester from Ospreys for the 2024-25 season, had not regularly been selected previously by Wales with Gareth Thomas consistently starting.
Smith has made just five starts in the previous 50 Tests for Wales.
“I don’t know why he wasn’t picked, because I wasn’t here, but I’m glad to have him here,” said Jones.
“He’s been good for us. He made his Ospreys debut with me in 2014 and been around for a while.
“I always remember him as a young fella. He’s always been strong, like gym-strong and I’ve always thought he was a really good player.
“Going to Leicester and seeing him again, if you’re a Leicester prop, you have to have that scrummaging mentality and he’s got it.
“He’s been excellent. Gareth Thomas is a massive leader off the pitch for us and around the defence and they actually balance out pretty well.”
Sale tight-head prop John, 32, was making his first Six Nations appearance and playing his first international for more than three years.
“He was excellent,” said Jones.
“Will is someone I was aware about years ago, coming through and he did a good job with Sale.
“He came back to Wales to further his chances. It didn’t work out but he’s a big, strong boy, probably the strongest in the squad.
“So I’m pleased for him. He’s a lovely kid. He’s been around a bit now to find his mojo.
“We’re in a good place scrum-wise. We’re still getting relationships with them, which is a big thing in coaching. Hopefully we’ll do a good job on the weekend.”
