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.
mobileserviceclient
django-tables2
xcode9
sisense
ekrecurrencerule
code-editor
beginthreadex
qaxobject
obsolete
deferred
jcarousel
256color
ts-morph
recycle-bin
pocket
angular10
integration-studio
drawrect
javadoc
serilog-expressions
content-script
react-spring
geany-plugin
tcpsocket
bigcommerce
on-duplicate-key
gamepad
hdpi
safari-extension
resolve