How to make a office add in multi host (word and powerpoint taskpane)

Question

I have been trying to make my word addin work for powerpoint aswell. I have read that it is possible and i need to do some stuff in the manifest.xml

  <Hosts>
    <Host Name="Document"/>
    <Host Name="Presentation"/>
  </Hosts>

But when i launch powerpoint the addin doesnt show up. no error or anything it just doesnt show up.

If anyone would be able to explain how i can debug it so i can find out what i need to do i would be very thankfull

EDIT:
Both will be running a Taskpane so I should be able to use one manifest.

aside form the code above the edit i also have this in the manifest

    <Hosts>
      <Host xsi:type="Document">
        <Runtimes>
          <Runtime resid="Taskpane.Url" lifetime="long" />
        </Runtimes>
        <DesktopFormFactor>
          <FunctionFile resid="Taskpane.Url" />
          <ExtensionPoint xsi:type="PrimaryCommandSurface">
            <OfficeTab id="TabHome">
              <Group id="CommandsGroup">
                <Label resid="CommandsGroup.Label"/>
                <Icon>
                  <bt:Image size="16" resid="Icon.16x16" />
                  <bt:Image size="32" resid="Icon.32x32" />
                  <bt:Image size="80" resid="Icon.80x80" />
                </Icon>
                <Control xsi:type="Button" id="TaskpaneButton">
                  <Label resid="TaskpaneButton.Label" />
                  <Supertip>
                    <Title resid="TaskpaneButton.Label" />
                    <Description resid="TaskpaneButton.Tooltip" />
                  </Supertip>
                  <Icon>
                    <bt:Image size="16" resid="Icon.16x16" />
                    <bt:Image size="32" resid="Icon.32x32" />
                    <bt:Image size="80" resid="Icon.80x80" />
                  </Icon>
                  <Action xsi:type="ShowTaskpane">
                    <TaskpaneId>ButtonId1</TaskpaneId>
                    <SourceLocation resid="Taskpane.Url" />
                  </Action>
                </Control>
              </Group>
            </OfficeTab>
          </ExtensionPoint>
        </DesktopFormFactor>
      </Host>
      <Host xsi:type="Presentation">
        <Runtimes>
          <Runtime resid="Taskpane.Url" lifetime="long" />
        </Runtimes>
        <DesktopFormFactor>
          <FunctionFile resid="Taskpane.Url." />
          <ExtensionPoint xsi:type="PrimaryCommandSurface">
            <OfficeTab id="TabHome">
              <Group id="CommandsGroup">
                <Label resid="CommandsGroup.Label" />
                <Icon>
                  <bt:Image size="16" resid="Icon.16x16" />
                  <bt:Image size="32" resid="Icon.32x32" />
                  <bt:Image size="80" resid="Icon.80x80" />
                </Icon>
                <Control xsi:type="Button" id="TaskpaneButton">
                  <Label resid="TaskpaneButton.Label" />
                  <Supertip>
                    <Title resid="TaskpaneButton.Label" />
                    <Description resid="TaskpaneButton.Tooltip" />
                  </Supertip>
                  <Icon>
                    <bt:Image size="16" resid="Icon.16x16" />
                    <bt:Image size="32" resid="Icon.32x32" />
                    <bt:Image size="80" resid="Icon.80x80" />
                  </Icon>
                  <Action xsi:type="ShowTaskpane">
                    <TaskpaneId>ButtonId1</TaskpaneId>
                    <SourceLocation resid="Taskpane.Url" />
                  </Action>
                </Control>
              </Group>
            </OfficeTab>
          </ExtensionPoint>
        </DesktopFormFactor>
      </Host>
    </Hosts>

I also did a npm run validate and it says it sees that it can be run on both word and powerpoint

Greetings

Milan