Due to my terrible experience with EcoFlow's customer service where I had to waste three days for them to follow their own policies, I would steer clear of their products.
If you use Amazon be aware that EcoFlow won't accept returns.
I've tried the EcoFlow River 3 for my 24x7 dashcams but it wouldn't power them for more than 24hrs. Their wH rating is suspect.
I'll be testing the Bluetti AC70, hopefully with better results. It also supports UPS (charge through) ability and comes with all needed cables.