How can I improve the low conversion rate on my websites?

I have had the opportunity to analyze the data from two of my websites on the Shopify platform and need recommendations on improving our conversion. I have read through the community forum and most of the suggestions we have already implemented. The stores are https://firstsourcewireless.com/ as well as https://www.wvbandcoms.com/ . Between the 2 stores, we receive around seventy thousand unique visitors a month, however, our overall conversion rate is lacking .20% . Our speed seems page load speed seems decent which I have illustrated below.

Waveband Website or https://www.wvbandcoms.com/

Lighthouse Scoring Calculator

Device type: MobileDesktopVersions: show allv10v8, v9v6, v7v5

latest

*v10*Value Metric Score Weighting

FCP (First Contentful Paint) 3,540 ms 34 10%
SI (Speed Index) 5,106 ms 62 10%
LCP (Largest Contentful Paint) 6,066 ms 13 25%
TBT (Total Blocking Time) 2,006 ms 8 30%
CLS (Cumulative Layout Shift) 0.02 100 25%

40FCP+3SI+6LCP+3

First Source Wireless Website or https://firstsourcewireless.com/

Lighthouse Scoring Calculator

Device type: MobileDesktopVersions: show allv10v8, v9v6, v7v5

latest

*v10*Value Metric Score Weighting

FCP (First Contentful Paint) 4,140 ms 21 10%
SI (Speed Index) 5,706 ms 52 10%
LCP (Largest Contentful Paint) 7,313 ms 5 25%
TBT (Total Blocking Time) 540 ms 55 30%
CLS (Cumulative Layout Shift) 0.00 100 25%

50FCP+2SI+5LCP+1TBT+17CLS

Keep in mind we have completed speed audits with fixes in the past and have seen little to no improvement in conversion. I look forward to hearing any well-thought-out solutions to our low conversion rates.

Hey there,

Thank you