When I added phone number for OTP(2FA) couple of years back(No TOTP support then) it got automatically added to my profile and guess what? When mobile number is added to the LinkedIn profile it is made visible to all your contacts. I didn't know it was the case until some random person started messaging me on WhatsApp and told me he saw my number on LinkedIn.
Now, they have support for TOTP apps which we can use without giving LinkedIn our phone number and they claim 'Mobile phone numbers added here won't be displayed on your LinkedIn profile.'; But I'm not willing to test it, not entering my phone number in LinkedIn ever.
Now, they have support for TOTP apps which we can use without giving LinkedIn our phone number and they claim 'Mobile phone numbers added here won't be displayed on your LinkedIn profile.'; But I'm not willing to test it, not entering my phone number in LinkedIn ever.