Is it possible to do validation via smarty meta tags in shop script 7?

Question

Smarty

The site has a plugin for displaying description and keywords. Meta patterns ( https://www.webasyst.ru/store/plugin/shop/bernacki... )
And there is a standard filling of the same tags without using a plugin.
The output is the same in both cases:
< meta name="Keywords" content="{$wa->meta('keywords')|escape}" />
< meta name="Description" content="{$wa->meta( 'description')|escape}" />
In the plugin itself (in the settings), you can set which meta tags will be displayed, by default (taken from the product card) or from the plugin (respectively, taken from the plugin).
QUESTION:
Is it possible to check through SMARTY:
if the meta tags in the card are filled,
Access is only to the template.