Ender 3 flow issue

Hello, I have this gaps in my prints, how can I solve it?

It looks like you may need to calibrate your filament to ensure clean prints.

I would recommend doing at minimum a temperature tower, flow rate test and also a retraction test to ensure your printer is printing properly.

You can do most of these tests from within most slicers such as OrcaSlicer and also Creality Print using the calibration menu in either slicer.