The local lad rose through the ranks at Old Trafford and Wayne Rooney's return home with a hamstring injury has left him as the only out-and-out centre-forward in the squad.
"I've only seen him for a short time but I've been impressed," enthused Moyes at a press conference in Bangkok. "He looks a very good player.
"A lot of the things he's done have been excellent. If we can add some goals to his tally from last year, it will make a big difference. From what I’ve seen so far, he's an exciting player and someone I'm looking forward to working with."
Jesse Lingard, Michael Keane and Adnan Januzaj who, like Welbeck, have played for the club's Academy, will all be handed a chance to shine during the tour, which begins with the Singha 80th Anniversary Cup game at the weekend.
"Tomorrow is my first opportunity to manage the team," added Moyes. "And it will take a little bit of time to get used to each other but that's what the games are for. We'll try and give as many people as we can an opportunity to play. We'll see some young players as well. Obviously, we will use all the games to prepare for the start of the season."
Some younger players have also been left behind and are likely to feature in the friendlies taking place in Britain and Ireland. Those competing at the Under-20 World Cup have been granted a break, namely Sam Johnstone, Guillermo Varela, Tom Thorpe, Larnell Cole and Angelo Henriquez.