To download all objects using wget:

wget -r -H -N --cut-dirs=4 --include-directories="/v1/" "https://swiftbrowser.dkrz.de/public/dkrz_70a517a8-039d-4a1b-a30d-841923f8bc7a/RCEMIP/ICON_NWP_CRM/?show_all"

Name
RCE_large_295
RCE_large_300
RCE_large_305
RCE_small_295
RCE_small_300
RCE_small_305
rcemip_modeldoc_ICON_NWP_CRM.pdf