It’s not grammatically incorrect to end a sentence with a preposition. It’s a common misconception that it is a rule, basically because one guy argued in favor of it back in the 1600s and had some support for formal writing in the 1700s. But it’s never been a broad rule, and even in formal contexts it’s not a rule in any current, reputable style or usage guides (so far as I know, at least).
It’s not grammatically incorrect to end a sentence with a preposition. It’s a common misconception that it is a rule, basically because one guy argued in favor of it back in the 1600s and had some support for formal writing in the 1700s. But it’s never been a broad rule, and even in formal contexts it’s not a rule in any current, reputable style or usage guides (so far as I know, at least).
Some more info on the topic: https://www.merriam-webster.com/grammar/prepositions-ending-a-sentence-with