Showing Cache TTL none

PageSpeed Insights shows Cache TTL as None. Chrome DevTools shows age 1436, CF Cache Status HIT, e.g.

As I really know very little about this stuff, should I change Cloudflare Browser Cache TTL to 6 months? Or do I need to add expires headers to htaccess file? In case it matters, I host at A2hosting.

Current settings:

Cloudflare (free plan) Browser Cache TTL set to Respect Existing Headers

Cloudflare plugin settings:
Cloudflare Cache-Control max-age 31536000
Browser Cache-Control max-age 60
htaccess for Cloudflare shows:

<Files 403.shtml>
order allow,deny
allow from all
</Files>

Thanks!

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