First just to make sure the template list isn't being filtered. Make sure the "Type" drop-down is set to "All" or in the case of the Device Asset Report you could set it to "Resource Statistics Report". You can also just type "asset" in the 'Template Name' search box it should come up in the results.
You can verify the report template is there by looking in <imc installation dir>\client\web\apps\imc\<reports and or reportsv2>\en\iMC-NETASSET
the Device Asset Report Template is netAssetInfo.jasper (if v2) or assetinfo.rpt
There was a change to the reporting engine. Your IMC is likely all the newer v2 reports (jasper reporting engine), but providing both paths just in case.
PL