copy button not showing in code block

[withrvr]

copy button shows in the readme file
( when visiting the repo or other places )

but

not shows in Github pages

I am talking about in the code block

in this code block
some code is written
something like this

try to hover on the upper right side of this block also
it will show here also but not on github pages

[stale]

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[withrvr]

copy button shows in the readme file ( when visiting the repo or other places )

but

not shows in Github pages

I am talking about in the code block

in this code block
some code is written
something like this

try to hover on the upper right side of this block also
it will show here also but not on github pages

in not work if we change to the theme
to pages-themes/cayman

so add the copy icon