font issue with windows/opera and macOS/all

hi,

i think there is a font issue . the default font used is not from the template.
is this normal ?
on windows/googlechrome+firefox all is ok
on windows/edge+opera there is a different font (like with serif)
on apple MAC (all browser), there is a different (like with serif).
The different font occures in the menu items and inside the module text container

do you think i need to add a inherit font somewhere or is this problem appear because i use a presset at first ?

thank you so much.
i feel ridiculous for such mistake, it is just a cookie/rgpd accept issue.

Your support is great.
Have a great day.