Where did you find Kethis? I can't see him anywhere in the spoilers

I saw him on Friday in the deckwatch discord. He also appears on the scryfall spoiler page

https://scryfall.com/sets/m20?order=spoiled&as=grid

Two cards I'm pretty surprised you aren't running: Captain Sisay to tutor a planeswalker every turn, and Primevals' Glorious Rebirth to resurrect all of your planeswalkers

remove Vraska, Swarm's Eminence . This card does nothing for your game. It only puts counters on the tokens it creates and you need to proliferate for you to use it a 3rd time.

Teyo, the Shieldmage is better off as a The Wanderer . In my superfriends, Teyo always stayed in my hand, and its 0/3 walls only chumped and did nothing against trample creatures. The Wanderer atleast makes damage spells redundant, and offers removal.

Kaya, Bane of the Dead is a answer to hexproof and indestructibles.

Grateful Apparition is terrible against any flyer. It is going to be removed, and often is a wasted 2 mana. Its only ever good if you get it off at turn 2, and in commander, thats not exactly likely.

Primevals' Glorious Rebirth and Seasons Past

Deploy the Gatewatch is better off a Harmonize . I've done the math and it more consistently whiffs than hits 2. Call the Gatewatch and Time of Need atleast fetch for the specific walker you need.

Bolas's Citadel is a must play in this deck. Sure you lose life, but it gives you a extra slot to your hand that you can cast for free. This card puts you so far ahead, the life lost is just a mere flaw

Evolution Sage needs to be in the deck if you are running superfriends

and finally. You NEED spot removal. Absolutely need it if you are going to win games in a superfriends shell. You need to be able to answer the creatures that possess a threat to your walkers.

If you still want planeswalker tutoring, I'd replace Deploy the Gatewatch with Ignite the Beacon . 2 less mana, you still net two planeswalkers, and instant speed. Ajani Unyielding has an incredibly useful ultimate.

I'm really not sure what Gods' Eye, Gate to the Reikai is doing in your deck tbh. I don't think Kaya's Ghostform does enough to be played over other cards, same with Oath of Kaya . I personally would cut Kaya, Orzhov Usurper too. I promise I don't hate Kaya as a character! but Kaya, Ghost Assassin is the better of the two imo

Also, TheBloopKing suggested Time of Need . It's a great card for fetching legendary creatures, but that's all it will get. So I wouldn't run it

LadyZ I'd still run Time of Need even in a superfriends deck. You can still search for Captain Sisay or Dragonlord Dromoka . I'll admit that its a bit lackluster in this deck