I have custom icons that work fine on IOS and Android. When I deploy on the Web, a crossed out box appears in each place in the App where my icon should appear.
app-transfer
vue-slick-carousel
app-store-distribution-profile
twitter-search
docker-app
proxmox
sqlcommand
laravel-routing
matrix-inverse
code-readability
remote-server
eo.webbrowser
maven-failsafe-plugin
indexer
aio-mysql
joml
watson-text-to-speech
boost-graph
dirty-checking
filtered
persistence.xml
cpu-time
apache-httpasyncclient
shopify-liquid
graphql-modules
for-loop
tabulator
job-scheduling
libsass
rdcomclient
