Avatar TLE - Katara, Waterbending Master and Avatar Kyoshi, Earthbender

Are these two cards are only available through the jump-in event?

That is the only information I have gotten, but the amount of information was a bit scarce so I want to reassure. I have done over 15 jump-in events and haven't seen either of these packages once.

https://preview.redd.it/osiwjxbdin4g1.png?width=380&format=png&auto=webp&s=b4c19c942486ac6f729cd7a40e9770c3fbff7d44

https://preview.redd.it/6gbdlnqein4g1.png?width=375&format=png&auto=webp&s=754d694ce160369691382eab14081e188570cc49