It doesn't work for medium weights, as it is not standard. I took my solution from Wolfgang, here: https://tex.stackexchange.com/questions/303648/context-font-weights

On Wed, May 25, 2022 at 6:32 PM Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl> wrote:
Hi Stefan,

I never used \definebodyfont but either \definefontfamily or typescripts
with \definefontsynonym.

Did you try \definefontfamily[custodia][rm][Custodia] ?

https://wiki.contextgarden.net/Command/definefontfamily

Hraban

Am 25.05.22 um 18:20 schrieb Stefan Nedeljkovic via ntg-context:
>
> Dear list,
>
>
> I'm trying to set up Custodia in LMTX, but the custodiasemibolditalic
> won't show up. It shows up regularly when I run mtxrun --script fonts
> --list --all --pattern=Custodia
>
> I'm attaching the output for reference. Any help would be appreciated.
>
>
> Sincerely,
>
> Stefan
>
> \definefontalternative[md]
>
> \definefontalternative[mi]
>
>
> \starttypescript [serif] [custodia]
>
> \definefontsynonym[Serif] [name:custodianormal][features=default]
>
> \definefontsynonym[SerifItalic]
> [name:custodianormalitalic][features=default]
>
> \definefontsynonym[SerifMedium] [name:custodiasemibold][features=default]
>
> \definefontsynonym[SerifMediumItalic]
> [name:custodiasemibolditalic][features=default]
>
> \definefontsynonym[SerifBold] [name:custodiabold][features=default]
>
> \definefontsynonym[SerifBoldItalic]
> [name:custodiabolditalic][features=default]
>
> \stoptypescript
>
>
> \starttypescript [serif] [custodia]
>
> \definebodyfont [default] [rm]
>
> [
>
> tf=Serif sa 1,
>
> it=SerifItalic sa 1,
>
> md=SerifMedium sa 1,
>
> mi=SerifMediumItalic sa 1,
>
> bf=SerifBold sa 1,
>
> bi=SerifBoldItalic sa 1]
>
> \stoptypescript
>
>
>
> \definetypeface [custodia] [rm] [serif] [custodia] [default]
>
>
>
>
>
> \usetypescript[custodia][uc]
>
> \setupbodyfont[custodia,rm,10pt]
>
>
> \starttext
>
>
> Regular Hamburgerfons,
>
> {\it Italic Hamburgerfons},
>
> {\md Medium Hamburgerfons},
>
> {\mi Medium Italic Hamburgerfons},
>
> {\bf Bold Hamburgerfons},
>
> {\bi Bold Italic Hamburgerfons},\\
>
>
> \setff{smallcaps}{Small Caps Hamburgerfons},
>
> \setff{smallcaps}{\it Small Caps Italic Hamburgerfons},
>
> \setff{smallcaps}{\md Small Caps Medium Hamburgerfons},
>
> \setff{smallcaps}{\mi Small Caps Medium Italic Hamburgerfons},
>
> \setff{smallcaps}{\bf Small Caps Bold Hamburgerfons},
>
> \setff{smallcaps}{\bi Small Caps Bold Italic Hamburgerfons}
>
>
> \stoptext
>
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