Hi, I checked checked with hosting provider they recommended theme developrs input and help.
In APM settings page options have written notice for developers and suggestions.
I have added it below for your reference. Can you please review it and let me know your inputs?
Thanks
Standard: The active theme integrates AMP as the framework for your site by using its templates and styles to render webpages. This means your site is AMP-first and your canonical URLs are AMP! Depending on your theme/plugins, a varying level of development work may be required.
Transitional: The active theme templates are used to generate non-AMP and AMP versions of your content allowing for each canonical URL to have a corresponding (paired) AMP URL. This mode is useful to progressively transition towards a fully AMP-first site. Depending on your theme/plugins, a varying level of development work may be required.
Reader: Formerly called the classic mode this mode generates paired AMP content using simplified templates which may not match the look-and-feel of your site. Only posts/pages can be served as AMP in Reader mode. No redirection is performed for mobile visitors: AMP pages are served by AMP consumption platforms.