While Toone was absent, others have taken their opportunity in an England shirt.
Aston Villa midfielder Lucia Kendall impressed in England’s 1-0 victory over Spain, while Manchester City’s Laura Blindkilde Brown started against Iceland.
United team-mate Jess Park has also played in the number 10 position, while Chelsea’s Lauren James is an option if she is not used as a winger.
While Toone says she has enjoyed watching her team-mates thrive, she is eager to prove herself to manager Sarina Wiegman again this week.
“You are never guaranteed to be selected, no matter what your journey has been like in an England shirt,” said Toone.
“Every time the squad comes out, you’re still worried you might not make it. Missing the last few camps, I knew I had to make myself available for this selection.
“I came to the last camp to see Alessia [Russo] and the girls and I reminded Sarina that I’m a number 10 and I’ll be ready for the next camp.”
Despite her eagerness to impress Wiegman, Toone says she has to remember “not to put too much pressure” on herself and to enjoy her return to action.
“I do play my best football when there is no pressure. That is what I’ve tried to do. I know I’ve been out for a long time,” she added.
“I made sure I used the time wisely and I feel like I’m in a really good place.”
Arsenal striker Alessia Russo, Toone’s best friend, says it is nice to have her “comfort blanket” back in the England squad for this month’s matches.
“I obviously did miss her when she wasn’t here. Everyone kept asking me if I was OK. I was like: ‘I’m fine!’
“She’s worked so hard to get back. Injuries are rubbish but she’s really matured over the last year or two and within her body. I’m really happy to have her back.”
