How many power supply devices do I need?

So I have a chord dac, and a roon nucleus, a panaflex power conditioner, an avr and an amp.

It's a "Panamax" power conditioner. Is it something like this...
https://www.crutchfield.com/S-1312SaRhLVa/p_299MR4000/Panamax-MR4000.html

Plug all your components into the Panamax, then Panamax into the wall receptacle.
No extra device needed between Roon and Dac.

I think you’re talking about a Panamax. Panaflex is a motion picture camera.
A power conditioner is not like a linear power supply, it filters and cleans the dirty power and grunge coming into your house. Most of them also have surge protection

Plug your components into the power conditioner to reduce noise from the electrical system in the house. It does not power your components.

https://en.m.wikipedia.org/wiki/Power_conditioner

https://en.m.wikipedia.org/wiki/Power_supply

Why do you need an external LPS on the amp and AVR?  

The HDPLEX looks interesting with it's variable voltage. But it does not indicate amperes.

I owned a Chord and it really does benefit using a LPS.

Amps and AVR’s have internal power supplies that are sufficient to drive the component. They could be switch mode (SMPS) or some type of linear. On the back of these components most likely there’s a IEC connection, which you plug your power cable into.

The Chord Dac has a small internal SMPS power supply and is able to accept a larger linear PS thru the plug in the back. Typically a linear PS is less noisy and more robust which can improve SQ.

The Roon also accepts a LPS, but I've never used one. You need to ask other Roon owners.

MC, you know that and I know that.

OP: what amp, AVR, and speakers do you have?