Yes, in Jainism Yakshas and Yakshinis are considered real spiritual beings. They are not gods in the Hindu sense, but protective guardian beings (nature/plate-spirit) that are said to accompany or guard Tirthankaras and important Jain places. Each Tirthankara and many Jaina temples are associated with specific Yaksha (male guardian) and Yakshini (female guardian) who are venerated as part of the Jain cosmology.

Key points:

• They are real beings in Jain belief, not fictitious legends.
• They function as guardians and helpers on the path to liberation, not as independent creators or supreme deities.
• Reverence to Yakshas/Yakshinis is usually part of temple rituals or personal vows, but main worship in Jainism remains directed toward the Tirthankaras and their teachings.
• There can be some differences in emphasis between Digambara and Śvetāmbara traditions on details of which Yaksha/Yakshini are associated with which Tirthankaras.

If you’d like, I can point you to a Jain Knowledge page that discusses Yakshas and Yakshinis in more depth.