Any Text+ clips won't show keyframes on the edit page as those are technically Fusion generators and seeing keyframes for Fusion effects / generators isn't supported on the edit page. You have to go into its Fusion comp and alter the keyframes in Fusion.
However, regular Text keyframes should show on the edit page. I can see them in V20 beta 2.
Now my Text feature in timeline edit is working. Problem was the font Open Sans, which was not included in my prefered font-list.
Text+: Yea, it'a is (was) a Fusion component, but new users would have no idea of this, meaning that using keyframes is very limited until the figure this out.