ECA is done for principal applicant (that is me).
Principal applicant would like to immigrate with family (spouse & daughter).
Does it require to perform ECA (Education credential evaluation) verification for spouse education credentials?
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As far as I can tell, the answer is pretty much the same than to your question about Quebec. The whole logic of the system is that instead of a fixed set of requirements that would put you either in or out, you need as many points as possible to improve your chances. If you think you don't need the points, you can forgo it but it can only help.
The page you found seems pretty clear to me:
you are an Express Entry candidate (or their spouse or common-law partner coming with them to Canada) being considered for the Federal Skilled Trades Program or the Canadian Experience Class, and you want points for your foreign education.
That means that your spouse's education won't count without ECA but also that it's not required per se. In practice, costs permitting, you should try to submit as much as possible.