Cannot create private channel as part of a new team payload

When I try to create a new team along with a new private channel, the channel is hidden & set to a standard membership type.

        reqBody := graphmodels.NewTeam()
	displayName := "My Test Team"
	description := "My very first test team"
	reqBody.SetDisplayName(&displayName)
	reqBody.SetDescription(&description)

	conversationMember := graphmodels.NewAadUserConversationMember()
	roles := []string{
		"owner",
	}
	conversationMember.SetRoles(roles)
	memberAdditionalData := map[string]interface{}{
		"user@odata.bind": fmt.Sprintf("https://graph.microsoft.com/v1.0/users('%s')", ownerID),
	}
	conversationMember.SetAdditionalData(memberAdditionalData)

	members := []graphmodels.ConversationMemberable{
		conversationMember,
	}
	reqBody.SetMembers(members)

	channel := graphmodels.NewChannel()
	channelDisplayName := "test pvt channel"
	channelDescription := "test pvt channel for test team"
	membershipType := graphmodels.PRIVATE_CHANNELMEMBERSHIPTYPE //setting membership type to private 
	channel.SetDisplayName(&channelDisplayName)
	channel.SetDescription(&channelDescription)
	channel.SetMembershipType(&membershipType)
	channel.SetMembers(members)
	channels := []graphmodels.Channelable{channel}
	reqBody.SetChannels(channels)

	templAdditionalData := map[string]interface{}{
		"template@odata.bind": "https://graph.microsoft.com/v1.0/teamsTemplates('standard')",
	}
	reqBody.SetAdditionalData(templAdditionalData)

	team, err := gc.Teams().Post(ctx, reqBody, nil)
	if err != nil {
		log.Panicf("error creating team: %v", err)
		return
	}

When I query for the channels in the new team created, it comes back as standard. I can see the new channel under Hidden Channels in the UI & it's set to a standard channel.

        channelsResp, err := gc.Teams().ByTeamId(teamID).Channels().Get(ctx, nil)
	if err != nil {
		log.Panicf("error creating channels: %v", err)
		return
	}

	for _, ch := range channelsResp.GetValue() {
		log.Printf("channel: %s: %s\n", *ch.GetDisplayName(), ch.GetMembershipType())
	}
       // logs:
       // channel: General: standard
      // channel: test pvt channel: standard

Expected Behavior:
Channel is shown & membership type is set to private
SDK version:
v1.43.0

Start by reproducing the provided Go example with Teams().Post using SDK v1.43.0, then inspect the returned team through Teams().ByTeamId(teamID).Channels().Get. Compare the serialized channel membershipType in the create request with the response and verify whether the Graph API preserves the private setting; done means the channel is visible and reports private, or the issue documents an API limitation.