RainTPL3 if or check

I need to check two variables in RainTPL3, and it should only show them if the either one is true. So I would want something that checks them:

I already tried the following, after asking ChatGPT, since I could not find any good documentation sources about RainTPL:

{if="$var1!='00:00' || $var2!='00:00'}
<p>
{$var1} - {$var2}
</p>
{/if}

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