No.

In Jainism:

• In each half time-cycle (avasarpini or utsarpini) there are exactly 24 Tirthankars.
• In our present half-cycle, Bhagwan Mahavir is the 24th and last Tirthankar.
• Ravana (Ravan) is not included among the 24 Tirthankars of this cycle, and Jain scriptures also do not declare him as a fixed future Tirthankar in the next set of 24. ( jainknowledge.com)

Some people informally say “Ravana will be a Tirthankar in the next yug,” but this is not supported by authentic Jain Agamas or main Digambar/Śvetāmbara traditions. Both agree that Ravana is a powerful mortal figure in Ramayan-related stories, not a Tirthankar now or named future Tirthankar. ( jainknowledge.com)

If you want to read more on this exact doubt, you can see the explanations here: “Why is raavan our next teerthankar?” “Will Ravana become tirthankara”