sagej is a publisher class and as such already takes care of most things itself. You should not (have to) load many additional packages or make modifications in the preamble.
I could not obtain the original template from SAGE, but I used the Overleaf template version https://www.overleaf.com/latex/templates/a-demonstration-of-the-latex2e-class-file-for-sage-publications/jcdyknyjrkzb that was linked in the comments.
The user guide states explicitly
You must select options for the trim/text area and the reference style of the journal you are submitting to.
and lists the following three options for citations
| Option |
Reference style |
sageh |
SAGE Harvard style (author-year) |
sagev |
SAGE Vancouver style (superscript numbers) |
sageapa |
APA style (author-year) |
You want superscript numbers, so you should use sagev instead of sageh.
Do not load natbib, cite, biblatex or any other bibliography/citation package yourself.
The document also suggests to use \bibliographystyle{sageV} in that case. (Although if you insist on using \bibliographystyle{ama} that should work as well. Do note though that the ama.bst from CTAN is not an official AMA style and has not been updated since 2002 according to the code comments.)
\documentclass[Afour,sagev,times]{sagej}
\begin{filecontents}{\jobname.bib}
@Article{art1,
author = {Author, A. N.},
title = {Title One},
journal = {Journal},
year = 2000,
}
@Article{art2,
author = {Author, A. N.},
title = {Title Two},
journal = {Journal},
year = 2008,
}
@Article{art3,
author = {Author, A. N.},
title = {Title Three},
journal = {Journal},
year = 2020,
}
\end{filecontents}
\begin{document}
Referring to articles\cite{art1,art2,art3}.
\bibliographystyle{sageV}
\bibliography{\jobname}
\end{document}

cite,natbib,biblatex, ...) as well as the specific citation/bibliography style you are using. Please show us a small example document that reproduces your current bibliography and citation setup with as little unrelated code as possible. At the moment we cannot help you properly, because we know too little about your setup. ... – moewe Jan 01 '22 at 08:36biblatexandnatbib, but the packages are incompatible and cannot be used together (so only one of the two tags make sense for your current setup). Here the tagmla-styleis also slightly confusing since MLA style is usually not associated with numeric citations (be it in superscript format or otherwise). MLA style uses in-text mentions of author (plus possibly work title). – moewe Jan 01 '22 at 08:40natbibwith\usepackage[sort&compress, super]{natbib}(do not load thecitepackage, do not loadbiblatex)? If that does not help, we really need to see an example document of your setup. There are too many things that could interfere here. – moewe Jan 03 '22 at 08:15\usepackage[sort&compress, super]{natbib}is not producing superscript citation. – user149054 Jan 03 '22 at 08:19sagej.clsandama.bstfrom? (My MikTeX system does not find them automatically, which means they are either not on CTAN or on CTAN with a license that makes distribution tricky/impossible.) – moewe Jan 03 '22 at 08:21sagej.clsfrom overleaf https://www.overleaf.com/gallery/tagged/sage (I have followed the first document style of the link). – user149054 Jan 03 '22 at 08:24sage latex template overleaf. Does it work for you: https://www.overleaf.com/latex/templates/a-demonstration-of-the-latex2e-class-file-for-sage-publications/jcdyknyjrkzb – user149054 Jan 03 '22 at 08:34sageh? If you usesagevthat seems to select a different citation style that is sorted, compressed and in superscripts. Presumably that option should actually be used with\bibliographystyle{SageV}and not with\bibliographystyle{ama}. – moewe Jan 03 '22 at 08:42sageh. I will submit a manuscript in one of the sage journals, there they require ama-style referencing. – user149054 Jan 03 '22 at 08:48sagevinstead ofsagehif no one told you explicitly to usesageh. The template says to use\bibliographystyle{SageV}or\bibliographystyle{SageH}, but if you insist you can probably also use\bibliographystyle{ama}. – moewe Jan 03 '22 at 08:50