To download all objects using wget:

wget -r -H -N --cut-dirs=6 --include-directories="/v1/" "https://swiftbrowser.dkrz.de/public/dkrz_70a517a8-039d-4a1b-a30d-841923f8bc7a/RCEMIP/ICON_AES/RCE_large305/0D/?show_all"

Name
ICON-CRM_RCE_large305_clivi_avg.nc
ICON-CRM_RCE_large305_clwvi_avg.nc
ICON-CRM_RCE_large305_hfls_avg.nc
ICON-CRM_RCE_large305_hfss_avg.nc
ICON-CRM_RCE_large305_pr_avg.nc
ICON-CRM_RCE_large305_prw_avg.nc
ICON-CRM_RCE_large305_rlds_avg.nc
ICON-CRM_RCE_large305_rldscs_avg.nc
ICON-CRM_RCE_large305_rlus_avg.nc
ICON-CRM_RCE_large305_rlut_avg.nc
ICON-CRM_RCE_large305_rlutcs_avg.nc
ICON-CRM_RCE_large305_rsds_avg.nc
ICON-CRM_RCE_large305_rsdscs_avg.nc
ICON-CRM_RCE_large305_rsdt_avg.nc
ICON-CRM_RCE_large305_rsus_avg.nc
ICON-CRM_RCE_large305_rsuscs_avg.nc
ICON-CRM_RCE_large305_rsut_avg.nc
ICON-CRM_RCE_large305_rsutcs_avg.nc