What does the team think? Are they OK with that? Has anyone expressed some concerns openly or in private? Have you at least talked about it?
Normally, you should avoid having a manager or "boss figure" in things like daily meetings or retrospectives because it changes the power dynamic. The team might look towards the manager as a figure of authority. And that can go anywhere. Maybe they have some hard time to get to an agreement on something. Just ask the manager to decide! Maybe there are some bad news to discuss and no one wants to be the bearer of bad news in front of the manger. Maybe the daily turns into a status update meeting instead of a synchronization point for the day. Even if the manager is just observing to keep themselves up to date with what's happening, people might start wondering what exactly are they observing? Etc.
Interactions between team members need to happen in a safe space. External people should join if the team asks for their help. If someone not from the team wants to join, then they should be mindful of the purpose of those callsteam ceremonies and working agreements and play by the team's rules and values.
A mature team might say yes and have no problem pushing back if things start to go into the weeds. A less experienced team might be uncomfortable with someone else joining, especially a manager/boss, even if they contribute to some extent.
Discuss things together and decide what to do. Maybe have things communicated in private if people are reluctant to share openly. Or even collect responses anonymously. Ultimately, it's the team that should decide. So find ways of bringing those details to light.