is a screenshot, not an R object that can be reproduced. Lacking a reprex. See the FAQ, I made up some data and guessed that the first sapply worked and the second was not.
get_coef <- function(x) lm(x ~ mpg, data = mtcars) |> coef()
apply(mtcars[2:11],2,get_coef)
#> cyl disp hp drat wt qsec
#> (Intercept) 11.260683 580.88382 324.082314 2.38248715 6.047255 15.3547689
#> mpg -0.252515 -17.42912 -8.829731 0.06042994 -0.140862 0.1241366
#> vs am gear carb
#> (Intercept) -0.67816541 -0.59149275 2.50626625 5.7787984
#> mpg 0.05553164 0.04966211 0.05879527 -0.1476459
Created on 2023-02-28 with reprex v2.0.2