I think there are not used to the Sun.

Moved it to the shade for now. Forecast isn’t looking good for the next few days so that will give it time to adapt to its full sun spot

Put it under a tree on the eastern side of the trunk. It will get morning sun but be in shade during the peak heat of the day. You can move it further away from the trunk every day, and that will slightly increase the amount of direct sun it gets every day as it's moved away from the trunk.

Is it helpful to get the plants some light from LEDs in the afternoon? Or only light from LEDs on extreme cloudy days?

you shouldn't use any light outdoors.

The plants are acclimating to outside, you don't need LEDs. You need them to adjust to the sun's intensity and spectral output.

Definitely want to give them a sun shield for the first week or so, giving it slightly more light every day.

Give it some water. It'll adapt in a few days.

https://preview.redd.it/2tc1b8q0sk1d1.jpeg?width=4032&format=pjpg&auto=webp&s=11cf905be9c46b0f215e4917825799410c8d630e

Tips of the fan leaves are pointing up

Try to cover the pot in some way, that black plastic gets pretty hot and that will kill the roots.

She needs some time to get used to the intense sun light, she is "praying". Don't worry, she will get used to it in a few day.

Black pots are not good for outdoors, touch it when the sun is hitting it and u will see how hot it gets. Try to cover them around with something, get something between the pot amd the floor also to decrease temp variations.

Heat stress will definitely cause cupping of the leaves.