Posting x4 times a day

Reach and engagement both will definately suffer with Posting 4x a day, Start with 1 a day, See how its performing and increase to max 2 a day, That is more than enough.

Yes if the posts are high quality and engaging posting 4 times a day is perfectly fine. Just make sure the content is not repetitive otherwise it may affect your reach. Quality and consistency are the most important.

Yes It can be possible that you can post 4 times a day if you working hard on your content and making every time different thing instead of same or repeated content in every post. Posting 4 times a day but the real and genuine content is the 4 times opportunity to get good reach by different audience. But remember if you mix up the content it can be harmful for your channel so be careful.

yeah you can post 4 times a day if the content is actually good. I don't think posting frequency alone will kill the reach. I'd just watch the numbers for a week or two. If engagement starts dropping, then maybe space the posts out a bit more.