I have come across some suggestions from ChatGPT that could help you achieve your goal.
Checking the source code for theme information: Right-click on the website, select "View Page Source," and search for the theme name or theme file reference.
Utilizing online tools: There are numerous online services available that can help you identify the WordPress theme being used on a website. Simply search for "WordPress theme detector" or "WordPress theme checker" and you'll find options to explore.
Contacting the website owner: You may want to consider reaching out to the owner of the website directly and inquiring about the WordPress theme they are using. Often, website owners are more than happy to share this information.