Configure 5.1 surround (6 channels) through 3 USB sound card/jack to USB adapter

[fickle night]

TL;DR: Read the title
Background Story: I've been using Asus Z506 (5.1) speaker for about 8 years now and I used it for my desktop back then. Unfortunately, I didn't have a motherboard that support 6 channels or a proper surround sound card. The closest thing I found was to repurpose the Line In and Microphone jacks to Output, but despite having 3 outputs, I couldn't turn them into a proper 6 channels audio output. Alas, only my 2.1 speaker worked.
Fast forward to today, I'm using an Asus ROG laptop with Linux Mint. Yesterday, I saw that Mac could do audio aggregation that functionally enables 5.1 surround through 1 audio jack and 2 additional jack-to-USB dongles. Here's the video explaining that https://www.youtube.com/watch?v=tan6XgV1SlY

Now back to my question: How can I setup 3 jack-to-USB dongles into a proper working 5.1 surround or 6 channels?
I cannot afford buying: AV receiver, sound blaster USB sound card, another proper surround speakers with different connections (HDMI eARC, S/PDIF, Toslink)
I can afford buying: jack-to-USB dongles, the cheap (under $20) Chinese USB surround card (usually with the blue paint)

This is what I meant by jack-to-USB dongle and cheap Chinese USB surround sound card

[covert dune]

just hook the blue box via USB and pray that Linux recognizes its features. then you need a 6-speaker powered set which uses those pinouts on the front of blue box. done.

make sure you can get a refund on the blue box in case linux can't run it

this is what's needed to be then fed by the blue box: https://www.ebay.ca/itm/316587801836