Sliding Door Parts

Hello!

I hope all is well. I am reaching out with a question about parts for a sliding door. I have a sliding door that does not lock anymore and want to make sure that I am ordering the right parts for the door. I attached an image of the inside of the lock. It is part number 7246B-4, but after researching sections of your website it seems that this part is not made anymore. I believe I should order https://www.swisco.com/Andersen-Frenchwood-Reachout-Lock/pd/Patio-Glass-Door-Replacement-Internal-Locks/82-037 as a substitute part.

I am wondering if I would need to replace the thumb latch as well. Any help would be appreciated.Thank you for your patience while I received more information about the existing door latch. Is it possible to receive part identification help via email?
Please find attach a word document that has several images in it that shows different parts of the setup. Let me know if this helps or if any more information would be helpful.

Thank you.
Madhat

Hi Tom,
Thank you for the response. I uploaded two more pictures. This part is located in the door key lock and mortise. Do you recommend that this part be replaced as well? My current situation is that whenever I try to lock the door using the door latch, it does not latch on. I am able to slide the door open even when I lock the door. If you need any more pictures or information, please let me know.