In the German forum it is said by tech support “Wavelab 7.2.1 or later can be used without problems in Windows 10th”. Windows 10 - Auf Deutsch - Steinberg Forums
That is also implied in the english comptibility chart, for WL LE 7.2.1, as in the german chart.
https://www.steinberg.net/nc/en/support/knowledgebase_new/show_details/kb_show/product-compatibility-info-regarding-microsoft-windows-10.html
So it would seem Wavelab 7.2.1 and up would be ok.