I use the following tool: geeup
https://github.com/samapriya/geeup

Upload all generated DEMs that are available in the folder that you created for the previous step. Upload the DEMs to a new ImageCollection asset in GEE.

Example code for Terminal: 
geeup upload --source "C:\Users\Ardrian Kreiner\OneDrive - ETH Zurich\ETH\Master\Masterarbeit\04_Bathymetry\STEP_3\Bathymetries\DEMs\SR_atl08and13_hOrtho_b" --dest "projects/ee-adriankreinerak/assets/TEST" --metadata "C:\Users\Ardrian Kreiner\OneDrive - ETH Zurich\ETH\Master\Masterarbeit\04_Bathymetry\STEP_3\Bathymetries\DEMs\SR_atl08and13_hOrtho_b\metadata.csv" --user "adriankreiner.ak@gmail.com"