Kale in berserker mode was able to take a kamehameha wave from Goku undamaged or almost undamaged. Now most fans didnt like the idea of Kale being as strong as a super saiyan blue and started to argue Kale wasnt as strong or stronger than a super saiyan blue because Goku said "I'm going to use a little more power", what they say it means Goku wasnt using his full power in super saiyan blue. I dont buy this idea for 3 reasons:
If Goku really said "I'm going to use a little more power" (some subtitles translates it as "I'm going to use more power" without the "little", if Goku really said so, he could be refering to him not using kaioken on top of blue. By using Super Saiyan Blue in full power, Goku is still using 5% or 10% of his power (he can use super saiyan blue kaioken x10 or x20 where he increases 10 times or 20 times his power from Blue)
Vegeta mentioned Kale is "a monster". Why would he call a monster someone who isnt as strong or stronger than him.
Jiren didnt bother to fight Goku or Vegeta super saiyan blue, but he bothered to take Kale as a challenge, this actually is a hint than Kale showed more power than Goku and Vegeta at the time, who already fought in Super Saiyan Blue. And by the way, Hit was also around and Jiren didnt bother to fight him, and we know Hit's power is around a Super Saiyan Blue.
Having said all that, later Kale in her controlled stated wasnt able to hurt Goku in super saiyan god, though she could handle an energy blast from Goku in super saiyan god (something Caulifla in SSJ2 couldnt do) . This to me shows Kale's power in her controlled stated is close to a super saiyan god, or at least stronger than a SSJ2, but not equal or stronger than super saiyan god.
Then my question is, are there reasons or arguments to believe Kale can use her full power when she isnt in berserker mode?