Some are - most are not.
Roku is not very supportive of IPTV player Channels/apps because of its potential for abuse by some. Especially those Channels/apps that are solely login gateways for various IPTV services.
Other than using an IPTV player on a laptop/computer/mobile device and either casting to Roku device or using HDMI cable, users that primarily use these IPTV services for a good deal of content viewing will find that an alternative streaming platform will probably be their best option and experience.
As a general rule, if a Channel/app has the potential to grant access to unlicensed/unauthorized content, going to be very difficult to find and use on the Roku platform.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
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