Did you know that you can reply to comments from Instagram and Facebook using one App?
It's called the Meta Business Suite. You can access it on mobile as well as on desktop via business.facebook.com. You can use it to manage your pages, reply to comments and messages from both Instagram and Facebook. If you want, you can add a WhatsApp button at the top of your page and run ads that send people to your WhatsApp business page. Interesting, right.
Get started with the meta business suite in this video.