Any WebView is OK!
Android Framework should be selected in LSPosed.
A webview app must be installed for all users (or in all spaces) to be selectable. Maybe deleting redundant users is alternative. adb command:
Get USER_ID list:
adb shell pm list users
Each user entry is as follow: UserInfo{USER_ID:USERNAME:INT} , USER_ID 0 is the main user.
Install apk for specific USER_ID:
adb install --user USER_ID PATH_TO_APK
or
adb shell pm install-existing --user USER_ID PACKAGE.NAME.OF.APK (for apks already installed for one user)
or
adb push PATH_TO_APK PATH_TO_APK_IN_PHONE (copy an apk file to phone from pc)
adb shell pm install --user USER_ID PATH_TO_APK_IN_PHONE
Delete a user (be careful, you may lose important data):
adb shell pm remove-user USER_ID
All the adb shell pm ... commands above can be run in an Android terminal simulator(root access granted) as pm ...
Reboot to take effect.