I can't code, but I used AI to make a plugin for my store that displays all prices in Bitcoin and gets the price data from my own Btcpayserver.
A couple bugs still, but not bad for a couple hours work. https://video.nostr.build/5d90fe8c0142bac8acf2bda59c3e9c8ed0c6cb8d88b9057f3f1514530d793e18.mp4
# BTC USD
btc_usd = [from your node]
# Price of the product in USD.
product_usd = 15.00
# Convert to sats
product_sats = (product_usd / btc_usd) * 100000000
# Format price to display with commas at hundreds place and sats units
product_sats_label = format(round(product_sats), ',') + " sats"
If only it was that easy
