what's your process for making seo report for client?

build it once in looker studio with search console and analytics plugged in, and the numbers fill themselves every month. then your time goes on the written summary, which is the part they actually pay for. add a note on the chart whenever something odd happened, like a site migration or a google update, otherwise you'll be explaining the same dip again in six months.

Mine is three parts and the first one is the only bit most clients read. Top: what changed this month in plain language, and what I did about it. Middle: the numbers backing that up - traffic and conversions grouped by landing page rather than sitewide, because sitewide hides everything interesting, plus rankings for the handful of terms that actually make money. Bottom: what's planned next month and what I need from them to do it. The failure mode is a thirty page dashboard export with no sentences in it. Nobody reads those, and worse, it makes you look like you spent the month measuring rather than working. If a metric doesn't change a decision, take it out.