Arcavios as a whole, and Strixhaven specifically, were hard-hit by the Phyrexian assault.

Source: https://www.cbr.com/mtg-march-of-machine-aftermath-wilds-eldraine-planes/

But it was only recently when "Phyrexian" became a proper in-game creature type and not just a concept for the lore and card art.

Source: https://www.cbr.com/coolest-original-magic-gathering-creature-types/

But the Phyrexian invasion was over almost as soon as it began.

Source: https://www.cbr.com/mtg-march-of-the-machine-story-ending-disappointing/

K'rrik ties into Phyrexia because he makes ample use of the Phyrexian mana mechanic.

Source: https://www.cbr.com/mtg-superdrop-2023-best-secret-lair-cards/

The Phyrexian Praetors are also still in the fight, as evidenced by a brand-new version of Jin-Gitaxias.

Source: https://www.cbr.com/mtg-march-of-the-machine-previews-legendary-team-mtg/