Good day, Guybrush_Threepwood_ 82!
I hope you are doing well.
My apologies for reaching out to you again. Regarding your thread (Data Validation Will Not Accept a Named Range - Microsoft Community).
We are glad that helps. Meanwhile, hope you kindly mark it as an answer and vote it up by your original account which raised this question (as seen in the screenshot). Once marked, it will automatically pin to top. As other users will also search information in this community, your valuable marked answer will definitely also help other users who have similar queries easily to find the correct channel and useful information more quickly.
Greatly Appreciate again for your patience and understanding.
I wish you keep safe and wish you all the best in year 2025 as well! 😊
Warm regards,
Katherine-V - MSFT | Microsoft Community Support Specialist.