The problem is how you are using lm; you shouldn't quote the formulas:
library(purrr)
lm1 <- lm(Sepal.Width ~ Petal.Width, data = iris)
lm2 <- lm(Sepal.Length ~ Petal.Length, data = iris)
list(lm1, lm2) %>% stargazer::stargazer(type = 'text')
#>
#> ===========================================================
#> Dependent variable:
#> ----------------------------
#> Sepal.Width Sepal.Length
#> (1) (2)
#> -----------------------------------------------------------
#> Petal.Width -0.209***
#> (0.044)
#>
#> Petal.Length 0.409***
#> (0.019)
#>
#> Constant 3.308*** 4.307***
#> (0.062) (0.078)
#>
#> -----------------------------------------------------------
#> Observations 150 150
#> R2 0.134 0.760
#> Adjusted R2 0.128 0.758
#> Residual Std. Error (df = 148) 0.407 0.407
#> F Statistic (df = 1; 148) 22.910*** 468.550***
#> ===========================================================
#> Note: *p<0.1; **p<0.05; ***p<0.01
Created on 2019-02-24 by the reprex package (v0.2.1)