Inserting dynamic data into a manifest.json

Im trying to use the data from my server connect to render in my manifest.json file.

PHP server model

The manifest is in my header.

<link rel="manifest" href="manifest.json">

At the top of my page i have
<html is="dmx-app" id="as" >

Say i have dynamic data {{companydetails.data.query1[0].name}} i tried to insert this in the json file, but it renders on the page as {{companydetails.data.query1[0].name}}. but outside of the json it “renders” perfectly.

my json file

    {
      "lang": "en",
      "dir": "ltr",
      "name": "{{companydetails.data.query1[0].name}}",
      "short_name": "{{companydetails.data.query1[0].name}}",
      "background_color": "red"
    }

Must i maybe add a delay before loading / linking the <link rel="manifest" href="manifest.json">

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