can cloudflare and cloudfront work together??

I think you almost answered your question already. If Cloudflare has features you want (and Cloudfront doesnt) then Cloudflare is obvious choice. If you want to read some comparisons of both CDNs to make sure you didn't miss anything important below question and it's answers might be helpful. I wouldn't recommend using both as that would add complexity and cost, with no obvious upsides.

https://repost.aws/questions/QUf_9wPYAVQfu4gjQbFOcEfw/which-cdn-do-you-would-recommend-for-a-wordpress-site-cloudflare-or-aws-cloudfront