Thanks for reaching out! We are here to help! Could you please confirm the version of Lightroom you wish to work with, is it Lightroom Classic or Lightroom (Cloud version)?
Generally, minimum requirements for Photoshop, Lightroom Classic & Lightroom need 8 GB of Ram and multiprocessor CPU and at least macOS 15 (Catalina). To make an informed purchase decision, we recommend you to please go through the minimum requirements articles for Lightroom, Lightroom Classic, and Photoshop from below.
Lightroom Desktop System Requirements
Lightroom Classic System Requirements
Photoshop System Requirements
Also, please feel free to check benchmarking websites for whichever MacBook you decide to buy.
We hope this helps you out!