Toney, who returned last month from an eight-month ban for breaching betting rules, was once again on target on Saturday as he helped Brentford go six points clear of the relegation zone with a 2-0 win over Wolverhampton Wanderers.
Toney's goal was his third in four league games.
The west London side's top scorer last season, with 20 goals in 33 Premier League appearances, Toney has been capped once. He made his debut against Ukraine in a Euro 2024 qualifier in March.
"I know what Ivan can bring, and I think it's something different England don't have," Frank told reporters. "Ivan played a fine game, not a top game, but the strikers need to score goals.
"He scored again when he had to and he played with illness, he was ill Thursday, Friday and today. It shows everything about his mentality. He is unique. He has always been committed for the team, for the club and his team mates."
Toney has been linked with a big-money move away from Brentford when the transfer window opens later this year.
But with the European Championship in Germany fast approaching, Frank is backing Toney all the way in.
"Who knows what is going to happen in the summer? What Ivan is very good at is being in the moment - right now, here, ready. That's what he is focusing on," Frank said.
"It would be great if he keeps going. He has all the qualities for it. We know we will create chances for him and big chances."
