you need to modify your PluginA.uplugin file
for example
{
"FileVersion": 3,
"Version": 1,
"VersionName": "1.0",
"FriendlyName": "PluginA",
"Description": " my plugin description.",
"Category": "MyPlugins",
"CreatedBy": "",
"CreatedByURL": "",
"DocsURL": "",
"MarketplaceURL": "",
"SupportURL": "",
"CanContainContent": true,
"IsBetaVersion": false,
"Installed": false,
"Modules": [
{
"Name": "PluginA",
"Type": "Developer",
"LoadingPhase": "Default"
}
],
"Plugins": [
{
"Name": "PluginB",
"Enabled": true
}
]
}