Cannot create shared channel with MembershipType="Shared"

[khha]

I try to provision a new Team in MS Teams with Invoke-PnPTenantTemplate. I am using the latest schema and using MembershipType="Shared". When I go to MS Teams I see a normal public channel. I run this script with my global admin account. What is going wrong?

Powershell 7 version: 7.4.0
PnP Powershell version: 2.2.0

Powershell command:

connect-PnPOnline https://myCompany.sharepoint.com/sites/teamify11 -Interactive
Invoke-PnPTenantTemplate -Path "C:\PS\Diversen\template.xml" -Parameters @{"TeamTitle"="PnPTeamDemo";"TeamAlias"="teamify11"}

PnP xml template:

<pnp:Provisioning xmlns:pnp="http://schemas.dev.office.com/PnP/2022/09/ProvisioningSchema"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  Author="KHHA"
  Generator="Human being"
  Version="1.0"
  Description="STAP SharePoint site and MS Teams template for provisioning"
  DisplayName="SharePoint/Teams Provisioning">

  <pnp:Preferences Author="KHHA" Version="1.0" Generator="Human being">
    <pnp:Parameters>
      <pnp:Parameter Key="TeamTitle">Test Team</pnp:Parameter>
      <pnp:Parameter Key="TeamAlias">testteam</pnp:Parameter>
      <!-- <pnp:Parameter Key="CompanyName">Contoso</pnp:Parameter> -->
    </pnp:Parameters>
  </pnp:Preferences>

  <pnp:Templates ID="SAMPLE-TEMPLATES">
    <pnp:ProvisioningTemplate ID="ProjectsTemplate" Version="1.0"
      BaseSiteTemplate="STS#3"
      DisplayName="Test"
      Description="Test"
      Scope="RootSite"
      TemplateCultureInfo="1040">

    </pnp:ProvisioningTemplate>

  </pnp:Templates>

  <pnp:Sequence ID="SAMPLE-SEQUENCE">

    <pnp:SiteCollections>
      <pnp:SiteCollection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:type="pnp:TeamSite"
        ProvisioningId="TEAM.SITE.01"
        Title="{parameter:CompanyName} Projects"
        Alias="{parameter:TeamAlias}"
        DisplayName="{parameter:CompanyName} Projects"
        IsPublic="true"
        IsHubSite="true"
        Description="{parameter:CompanyName} Projects"
        Classification="MBI"
        Teamify="true"
        HideTeamify="true"
        Language="1033">
        <pnp:Templates>
          <pnp:ProvisioningTemplateReference ID="ProjectsTemplate" />
        </pnp:Templates>
      </pnp:SiteCollection>
    </pnp:SiteCollections>

  </pnp:Sequence>

  <pnp:Teams>

    <pnp:Team GroupId="{sequencesitegroupid:TEAM.SITE.01}"
      DisplayName="{parameter:TeamTitle}"
      Description="STAP project" Visibility="Private" Archived="false"
      MailNickname="{parameter:TeamAlias}">

      <pnp:Channels>

        <pnp:Channel DisplayName="General"
          Description=""
          IsFavoriteByDefault="true">
        </pnp:Channel>

        <pnp:Channel DisplayName="Project Realisation"
          Description=""
          IsFavoriteByDefault="true"
          MembershipType="Shared">
        </pnp:Channel>

      </pnp:Channels>
    </pnp:Team>

  </pnp:Teams>

</pnp:Provisioning>