Here's an example SVG with four images (all referencing the same image -- this is a simple checkerboard raster (I tried using a more visual example, but the base64-encoded strings for photos seem to be too big for UserVoice)).

• I believe this is first plagued by the same problem as https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/50819006-svg-import-bug-svg-parser-is-incorrectly-depend . If I import as written here, all fills show up blank in Illustrator.
• Once I reorder the defs to be at the top, I can see that the image is somewhere in here, but it is not rendering correctly in my file (see screenshot), presumably because of the pattern usage

<svg width="1486" height="395" viewBox="0 0 1486 395" fill="none" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<rect width="1486" height="395" fill="white"/>
<rect x="63.2698" y="75.3048" width="333.655" height="233.559" fill="url(#pattern0_22_26)"/>
<rect x="1039.4" y="75.3048" width="333.655" height="233.559" fill="url(#pattern1_22_26)"/>
<rect x="796.617" y="75.3048" width="135.782" height="233.559" fill="url(#pattern2_22_26)"/>
<rect x="502.769" y="75.3048" width="186.852" height="233.559" fill="url(#pattern3_22_26)"/>
<defs>
<pattern id="pattern0_22_26" patternContentUnits="objectBoundingBox" width="1" height="1">
<use xlink:href="#image0_22_26" transform="matrix(0.00390625 0 0 0.00558036 0 -0.214286)"/>
</pattern>
<pattern id="pattern1_22_26" patternContentUnits="objectBoundingBox" width="0.230178" height="0.328825">
<use xlink:href="#image0_22_26" transform="scale(0.000899132 0.00128447)"/>
</pattern>
<pattern id="pattern2_22_26" patternContentUnits="objectBoundingBox" width="1" height="1">
<use xlink:href="#image0_22_26" transform="matrix(0.00390625 0 0 0.00227094 0 0.209319)"/>
</pattern>
<pattern id="pattern3_22_26" patternContentUnits="objectBoundingBox" width="1" height="1">
<use xlink:href="#image0_22_26" transform="matrix(0.0232565 0 0 0.0186057 -4.82867 -1.88153)"/>
</pattern>
<image id="image0_22_26" width="256" height="256" preserveAspectRatio="none" xlink:href="data:image/png;base64,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"/>
</defs>
</svg>