All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Wearing shoes while performing the prayer does not hinder the proper sitting posture during the prayer. The legislated sitting posture between each two prostrations and during Tashahhud (recitation of the invocation: At-tahiyatu Lillah…) is done by stretching the left foot and sitting on it, and erecting the right foot. As for the final Tashahhud (directly before Tasleem-for ending the prayer), it is done by stretching out ones left foot letting it project from right side with ones buttocks resting on the ground. Wearing shoes does not hinder such posture, and therefore, there is no need for taking them out.
For more benefit, please refer to Fataawa 367402 and 86719.
Allah knows best.