Given that they are sold by Warco, I would think they should be!
Ensure you choose holders of appropriate size for the lathe’s tool-post height and centre-height; and tips appropriate for the materials.
You can’t expect industrial metal-shifting rates on a small lathe but there is no reason indexible tooling can’t be used on them, and the notion that it can work only at phenomenal industrial speeds is not really true.
I use a mixture of HSS and carbide tooling at modest speeds on my elderly Myford ML7, without problems.