To download all objects using wget:

wget -r -H -N --cut-dirs=5 --include-directories="/v1/" "https://swiftbrowser.dkrz.de/public/dkrz_0b2a0dcc-1430-4a8a-9f25-a6cb8924d92b/CMCC_CMIP/CMIP6.CMIP.CMCC.CMCC-CM2-SR5.historical.r1i1p1f1.day.pr.gn.v20200616/time/?show_all"