Hi MrM,
first-ever is a compound adj. and it contains an adj. 'first' + an adv. 'ever'.
'Ever' here probably is not associated with time. It is simply used as an intensifier, which modifies the adj. 'first' in front.
In short, first-ever simply means first. No wonder, the examples I presented made you feel a little uncomfortable.
from Cambridge
ever (EMPHASIS)
adverb
used for emphasizing an adjective:
e.g. The orchestra is to perform its last ever concert/last concert ever tomorrow night at the Albert Hall.
e.g. Yesterday the company announced its first ever fall in profits.
from Longman
first-ever adjective
e.g. her first-ever television interview
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MrP, I don't like to solve puzzle. Please ask your question in a different way.