the ones i'd put in front of a client: clicks and impressions from search console, position for the handful of keywords that actually bring customers, and conversions from organic traffic in GA4. maybe indexed page count if the site's had technical problems.
ignore domain authority, "seo score", and anything a tool gives you out of 100, they're not things google measures. small scale: four numbers, once a month, in a sheet. that's a better report than most agencies send.