I'm gonna take a crack at giving some suggestions, hope it's good help my dude.
Not entirely sure about the power level each of these should be, but I'll try to not make any of them too weak or too overpowered.
I think it'd be neat if each had an upright ability and a reversed ability, but here we go.
The Fool: Illusion magic might be a better fit for The Fool due to the foolish and naive nature of The Fool.
The Magician: A powerful, standard energy based attack with varying strengths and sizes.
The High Priestess: Maybe some kind of telepathic power?
The Empress: I'm tempted to say a charm-type power but that'd probably be too similar to The Emperor, so probably the ability to summon some kind of apparition or creature to come to their aid.
The Hierophant: This is a little specific but the ability to summon solid illusions of a single object, for the whole "Conformity" part.
The Lovers: The ability to merge one object to another, like being able to trap someone in their armour or something like that.
The Chariot: The Emperor's ability actually fits for Chariot too, but I think that calming someone down or making them violent/confused is a good alternative.
Strength: Straight up physical strength bonus makes sense, although if you wanna go the less obvious path I suggest something like telekinesis, since Strength also includes control.
The Hermit: Create a barrier or thick armour, to reflect on the seclusion of The Hermit.
Wheel of Fortune: 1000% I think this should straight up be like some kind of wild magic that just does whatever it wants.
Justice: Zone of Truth? Although zone of truth doesn't force someone to speak, it can make it pretty evident that someone is lying.
The Hanged Man: A kind of kamikaze ability? Maybe creates some kind of destructive force that originates from the user, thus damaging them too.
Death: Polymorph, because Death usually means transformation or change. But I think necromancy also works.
Temperance: Clairvoyance?
The Devil: I imagine chains coming out from some kind of surface, being controllable, but being very useful for detaining others.
The Tower: Control and create a small or large scale natural disaster.
The Star: Creates an aura which heals those inside.
The Moon: My alternate suggestion for The Moon would be to make people fall asleep, or an even stronger version, to make them turn to stone.
The Sun: I'm thinking something to do with fire, there's a lot of neat fire based spells out there that you could look at for inspiration.
Judgement: I think it'd be cool if this was a kind of Ex Machina type ability, where it actually objectively judges someone's actions and punishes or rewards them accordingly.
The World: Teleportation or flight.
Hope some of my suggestions help you come up with better ideas lmao, good luck.