How many bytes does the file have ?
If it is zero bytes, then direct recovery might not be possible.
Like Carlos says:
[Picture]
https://i.postimg.cc/Z5DxFybC/ods-zipped-content.gif
Inside content.xml, it looks like this. This is one row containing 1 <tab> 2 <tab> 3 as the data content.
Some amount of material was removed to make this appear less complicated.
<?xml version="1.0" encoding="UTF-8"?>
<office:document-content
<office:scripts/>
<office:font-face-decls>
<style:font-face style:name="Liberation Sans" svg:font-family="'Liberation Sans'" style:font-family-generic="swiss" style:font-pitch="variable"/>
</office:font-face-decls>
<office:automatic-styles>
<style:style style:name="co1" style:family="table-column">
<style:table-column-properties fo:break-before="auto" style:column-width="2.258cm"/>
</style:style>
<style:style style:name="ro1" style:family="table-row">
<style:table-row-properties style:row-height="0.452cm" fo:break-before="auto" style:use-optimal-row-height="true"/>
</style:style>
<style:style style:name="ta1" style:family="table" style:master-page-name="Default">
<style:table-properties table:display="true" style:writing-mode="lr-tb"/>
</style:style>
</office:automatic-styles>
<office:body>
<office:spreadsheet>
<table:calculation-settings table:automatic-find-labels="false" table:use-regular-expressions="false" table:use-wildcards="true"/>
<table:table table:name="Sheet1" table:style-name="ta1">
<table:table-column table:style-name="co1" table:number-columns-repeated="3" table:default-cell-style-name="Default"/>
<table:table-row table:style-name="ro1">
<table:table-cell office:value-type="float" office:value="1" calcext:value-type="float">
<text:p>1</text:p>
</table:table-cell>
<table:table-cell office:value-type="float" office:value="2" calcext:value-type="float">
<text:p>2</text:p>
</table:table-cell>
<table:table-cell office:value-type="float" office:value="3" calcext:value-type="float">
<text:p>3</text:p>
</table:table-cell>
</table:table-row>
</table:table>
<table:named-expressions/>
</office:spreadsheet>
</office:body>
</office:document-content>
My data values of "1 2 3" are recoverable.
Paul