Is there to produce a square root trend-line using Excel or google sheets?

I have some data which theory informs me that it should produce a square root function. However, I don’t see an option for square root function among the trend-line list of possible functions. There is a power series option but that does not let me to control the exponent so for my data it generated a relationship of x^(0.34) = y

I know that I can square my dependent variable to produce a linear relationship which works, but I am trying to specifically produce a square root ?