Johnson arrived at Selhurst Park in a £35million move from Tottenham Hotspur during the January transfer window, one of the stand-out deals of the winter market.
However, the 24-year-old is still waiting for his first goal for his new club, having endured a four-month drought stretching back to his last strike — a goal that came in Wales’ emphatic 7-1 World Cup qualifying win over North Macedonia.
Despite that, Bellamy remains convinced the winger’s quality will shine through, particularly in a different tactical environment.
“He was looking for more game time,” Wales manager Bellamy said of Johnson’s switch across London and ahead of the Dragons’ World Cup play-off semi-final.
“It hasn’t quite materialised because they have quite a consistent group there and the way they play, but it’s an established Premier League club and I’m sure he’ll do brilliant at Palace.
“It’s never easy moving during the season. Sometimes it really works and sometimes it’s a slow burner.
“His has been a little bit slower, but we play completely different to how Palace play.
“There is no right or wrong in that, but I just focus on what he can offer us and he can offer us a lot.”
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That contrast between club and country could prove crucial as Wales prepare to host Bosnia and Herzegovina in a high-stakes World Cup play-off semi-final in Cardiff.
Victory would set up a final against either Italy or Northern Ireland, with a place at this summer’s tournament on the line.
For Johnson, the international stage has often provided a platform to thrive.
His display in November’s rout of North Macedonia was among his most influential in a Wales shirt, with Bellamy able to utilise the player’s direct running and attacking instinct that made him such a key figure at Tottenham.
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Last season, he scored 18 goals for Spurs and cemented his place in club folklore by netting the winner in the Europa League final against Manchester United in Bilbao — a moment that underlined his ability to deliver on the biggest occasions.
At Palace, though, the picture has been more complicated. Competition for places has limited his opportunities, with Ismaila Sarr establishing himself on the right flank.
Manager Oliver Glasner has even experimented with Johnson in a wing-back role, highlighting the challenge of fitting him into an already settled system.
So far, Johnson has made 15 appearances for Palace without registering a goal or assist — a return that has prompted questions from supporters given the scale of the investment.
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Bellamy, however, is focused solely on what the player can bring to his national side — and he believes that remains significant.
“He was really sharp and a big part of that performance. I think we’ve seen what he can do.
“With his ability he should be looking to go by players all the time. Run past them and commit them, whether that’s inside or outside.
“He was a real big threat with his runs in behind, the timing, the counter-movement.
“His overall performance was top and he can do that against Bosnia.”
Wales head into the play-offs with renewed belief following an encouraging run of performances, and Bellamy’s faith in Johnson reflects a broader confidence within the squad.
With attacking options continuing to develop and key players returning to form, expectations are quietly building ahead of the semi-final.
For Johnson, the upcoming fixtures offer an ideal opportunity to reset.
While his club form may still be finding its rhythm, his international record suggests he remains a player capable of making a decisive impact when it matters most.
And with a World Cup place within touching distance, Bellamy is backing him to deliver once again on the biggest stage.
