You can link a channel in your profile or other channels by following these steps:
Go to the channel page you want to link.
Click the copy link icon next to the channel name to copy the link (this link will already include your referral link).
To add this link to your profile:
Go to your profile settings by clicking on your account icon.
In the "Website link" section, paste the copied channel link.
Save the changes, and the channel link will appear on your profile.
You can also paste the link in the channel description within the channel settings.
Furthermore, you can share this link on your social media profiles to attract more followers to your channel.