I think it would be “anit-CM” to do spelling in 1st and 2nd grade.
That being said, it is your homeschool and you can do what you feel is best.
From my experience with my older two girls, spelling didn’t really help with reading ability because they are usually spelling words that they already know how to read. The spelling words are lower than their reading level. I think that phonics and reading practice are more helpful at that age than spelling.
I’m not doing spelling with my youngest who is in first grade this year. It takes a little bit of faith! But, I’ve read enough of Charlotte Mason to believe that it will work.