Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Bloomburrow Commander Tokens

Modern Horizons 3 Tokens

Murders at Karlov Manor Commander Tokens

Wilds of Eldraine Commander Tokens

Liberated Livestock

When Liberated Livestock dies, create a 1/1 white Cat creature token with lifelink, a 1/1 white Bird creature token with flying, and a 2/4 white Ox creature token. For each of those tokens, you may put an Aura card from your hand and/or graveyard onto the battlefield attached to it.

When one leonin hunts, many more are surely nearby.

Leonin Warleader

Whenever Leonin Warleader attacks, create two 1/1 white Cat creature tokens with lifelink that are tapped and attacking.

Oketra's closest viziers are known as her chosen, though others may have a better claim to that moniker.

Regal Caracal

Other Cats you control get +1/+1 and have lifelink.
When Regal Caracal enters the battlefield, create two 1/1 white Cat creature tokens with lifelink.

Other Cats you control get +1/+1 and have lifelink.
When Regal Caracal enters, create two 1/1 white Cat creature tokens with lifelink.

Pride Sovereign

Pride Sovereign gets +1/+1 for each other Cat you control.
{W}, {T}, Exert Pride Sovereign: Create two 1/1 white Cat creature tokens with lifelink. (An exerted creature won't untap during your next untap step.)

Cubwarden

Mutate {2}{W}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Lifelink
Whenever this creature mutates, create two 1/1 white Cat creature tokens with lifelink.

Ajani, Adversary of Tyrants

+1: Put a +1/+1 counter on each of up to two target creatures.
−2: Return target creature card with converted mana cost 2 or less from your graveyard to the battlefield.
−7: You get an emblem with "At the beginning of your end step, create three 1/1 white Cat creature tokens with lifelink."

[+1]: Put a +1/+1 counter on each of up to two target creatures.
[−2]: Return target creature card with mana value 2 or less from your graveyard to the battlefield.
[−7]: You get an emblem with "At the beginning of your end step, create three 1/1 white Cat creature tokens with lifelink."

Ajani, Adversary of Tyrants Emblem

At the beginning of your end step, create three 1/1 white Cat creature tokens with lifelink.