The 28-80 has everything your D5200 needs to function in manual mode, including focus confirmation. AF-S or AF-I are required for the body to focus the lens, but the parts that determine whether or not the image is in focus don't need it.

Lenses like that one tend to have lightweight, low-drag mechanicals that make it easy for the in-body focus motor to focus rapidly and precisely. Lenses built for manual-focus only tend to have some drag that makes precise focusing by hand much easier.

When you're trying to focus a low-drag lens by hand, it's very easy to pass the very-small point where the AF system thinks the image is in focus, making it look like you're not getting confirmation at all. There's a custom setting (a4 on the D5200, a-something-else on other Nikon bodies) that will switch the exposure meter in the viewfinder to a rangefinder that indicates of how close to in focus you are and which direction.

Adding a Dandelion chip to your other lenses will turn them into CPU lenses that give the body enough information to enable in-camera metering. It won't do anything focus-related.