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.
asp.net-core-staticfile
vapid
createcriteria
subgit
broccolijs
joomla1.6
mermaid
sandcastle
foswiki
deep-diff
unity3d-gui
flume-ng
visual-studio-2015
structurizr
julia-pkg
google-cloud-scheduler
pymodm
django-sessions
react-tsx
bpf
eleventy
aba
playwright-java
linkage
ipconfig
suspend
htmltidy
bootstrap-form-helper
input-field
kubeapps