Short answer:

• In the general Jain view for the present cosmic cycle, all 24 Tirthankaras are considered male (this is the Digambara position). Some Śvetāmbara texts, however, regard the 19th Tirthankara Mallīnātha as female, so there is a difference between traditions on that point. There isn’t a widely accepted doctrine that future Tirthankaras will be female in the current cycle.

Notes:

• Digambara perspective: all Tirthankaras are men; a woman cannot reach kevala jnana to become a Tirthankar in this cycle.
• Śvetāmbara perspective: Mallīnātha is sometimes depicted as female in their tradition, reflecting a view that women can attain the status of Tirthankar in that lineage.

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