Multiple footfullcite with page numbers

I want to use footfullcite for two citations after a paragraph. But the citations should be same footnote. The issue I am having is that I also want page numbers attached to each citation.

In this MWE

\begin{filecontents*}{\jobname.bib}
@article{article1,
title = {Article1},
author = {Alpha, A},
journal= {Prestigious Journal},
year={2021}
}
@article{article2,
title = {Article2},
author = {Beta, B},
journal= {Prestigious Journal},
year={2021}
}
\end{filecontents*}

\documentclass{memoir}
\usepackage[backend=biber]{biblatex}
\begin{document}
\footfullcite[p.15]{article1} \footfullcite[p.20]{article2}
\end{document}


I'd like to have as a footnote.

1 A Alpha. “Article1”. In: Prestigious Journal (2021), p.15.; B Beta. “Article2”. In: Prestigious Journal (2021), p.20.

Usually this is a job for the multicite version of your cite command, see Multiple citations with pages using BibLaTeX. But there is no multicite version of \footfullcite, so we have to define one with \DeclareMultiCiteCommand before we can use it.

\documentclass{memoir}
\usepackage[backend=biber]{biblatex}

\DeclareMultiCiteCommand{\footfullcites}[\mkbibfootnote]

\begin{document}
Lorem\footfullcites[380]{sigfridsson}[20]{worman}
\end{document}


Note that you don't need to (and indeed should not) give the "p." prefix in the postnote argument. biblatex automatically adds the appropriate page prefix ("p."/"pp.") for numeric postnotes.

I think there is no multicite version of \footfullcite, because the command is supposed to be used as a one-off. If you want all citations to be long citations in the footnote, a verbose style might be more appropriate.

\documentclass{memoir}
\usepackage[backend=biber, style=verbose]{biblatex}

\begin{document}
Lorem\autocites[380]{sigfridsson}[20]{worman}
\end{document}


The output is the same in this example.

You can use two \fullcite commands in a single \footnote:

\begin{filecontents*}{\jobname.bib}
@article{article1,
title = {Article1},
author = {Alpha, A},
journal= {A Journal},
year={2021}
}
@article{article2,
title = {Article2},
author = {Beta, B},
journal= {A Journal},
year={2021}
}
\end{filecontents*}

\documentclass{memoir}
\usepackage[textheight=3cm]{geometry}
\usepackage[backend=biber]{biblatex}