I inherited a colleague's Power Automate flows and I'm afraid to touch them

Sarah's last day was three weeks ago, and this morning her flows officially became mine. IT transferred ownership of eleven cloud flows to my account and closed the ticket. Eleven. I knew about three of them. The names do not help: two are called New flow, one is called Copy of Invoice thing TEST, and the one everyone actually depends on, the contract renewals reminder, is in there somewhere under a name I have not worked out yet.

I had one real win today. The simplest one, a flow that posts a Teams message when a form is submitted, I opened it, read it top to bottom, understood every step, and wrote four lines about it in my notebook. One down. It felt good for about ten minutes.

Then I opened the renewals flow. Forty-odd actions, conditions nested inside conditions, and an expression in the date step that wraps three functions around something called utcNow. There is a comment in exactly none of them. I clicked into one action to read it, and a banner reminded me I was editing the live flow. I backed out without saving and closed the tab, and then spent the next hour wondering whether I had accidentally changed something anyway. Legal asked me on Friday whether the renewal reminders are still going out. I said yes. What I meant was: run history was green the last time I looked, and I am praying.

What I need is a way to go through these one at a time without being able to break anything: work out what each flow does, what it touches, who depends on it, write that down somewhere shared, and make an honest call on each one: keep it, fix it, rebuild it properly, or switch it off. Eleven small decisions instead of one giant fear. Then the next time someone leaves, there is a register, and the person after me does not inherit the same black box.