For group interviews, there are definitely a different set of considerations you need to be aware of. While regular interview tips are still valid (come prepared, be calm, be interested, show your best self), there are additional things to consider.
Know which soft-skills the role is looking for.
Different roles will be looking for different skills, both in technical ability and soft-skills such as teamwork and leadership.
For some managerial positions, the group stage may be looking for people who can take on all points of view (organically) and help keep the peace - helping to (directly or indirectly) lead the team to success.
Being aware of what they are after, will allow you to tailor how you respond to your team members - and come across as highly employable.
For your apprenticeship, it may be likely that they are looking for somebody who is open to learning, is excited about solving problems and who enjoys collaborating. In this case, feeling comfortable to ask questions, building friendly rapport with your team and avoiding coming across as domineering (a.k.a. a one-man-band) will likely do a lot to help you.
Consider how you will conduct yourself with incompetent candidates.
It's likely at least one person you interact with during the group interview, will be a clear bad-fit.
However, you need to be mindful that it is not your place to show anybody up or put them in a bad light. Just as you would act in the job itself when dealing with such a person (as realistically happens); you need to remain calm, understanding and allow them to have their say.
Showing your ability to keep the peace, while still suggesting improvements if you know of them, is key. Allowing everybody to have their say, even at the loss of (complete) success, often comes off well in a group interview. Being overly stubborn can be a real red-flag.
Consider how you will conduct yourself with better qualified candidates.
Similarly, when in a team with candidates who know more than you on a specific subject - don't try to minimise their knowledge or put them down.
Accept that this is normal (and will be on the job too), and ask questions to better understand their suggestions; learning from them.
Of course, this doesn't mean to take everything they say and lethargically let them do everything. But don't try to saboutage them to look better (you won't).
Realise that group interviews are not a direct competition.
Finally, it's worth always remembering that the interview is not a competition with the people directly on your team.
In general, there will be multiple group rounds held separately, and often multiple teams formed in each session. As such, you are not being pitted against those you work with directly - but instead, the candidate pool as a whole.
Doing what you can to show your ability to work well with others, and help each other succeed as a team - will be noticed by the interviewers (positively), while saboutaging others or trying to hog the spotlight will simply paint you as the troublemaker of your team.
(Importantly, you should remember that there's no rule saying your entire team can't be taken forward to the next interview stage - group interviews are not based on the hunger games)