EcoFlow has non continuous output. Shouldnt be a problem for PC, but some loads ae sensitive to it:

EcoFlow Delta Pro - RTFM Dummy! EEVblog2 https://www.youtube.com/watch?v=5JT8M8v_zNg

Bluetti dos much better:

Bluetti AC500 / B300S Power Bank - Review & Teardown mikeselectricstuff https://www.youtube.com/watch?v=RuEO17uvI8M