Combining graphs that do not match

Hello Excel community,

I am trying to combine two graphs of data my colleagues created with information that does not match. I'd like to just take the missing data from one and add it manually to a new one to show the results from each to compare. I'm not sure what I'm doing here. These are graphs from 2024 and 2025 about data collected from places that were visited and data collected during those times.

Any help would be appreciated.