Career progression conversation with manager

I have regular catch ups with my skip line manager and he’s always talked about how he can support my career progression, where do I see myself in 5 years etc. But it’s mostly around how I can progress within my current team. I have now reached a natural ceiling in my specialisation and to progress further within my team, I’ll either have to broaden my skills/specialisation or take up some management / strategy role. Neither of which is particularly appealing to me.

Lately, I attended some leadership workshop as part of our broader business and connected with senior leaders from outside our business line. I was encouraged to think about skills transferability and I was introduced to people in another part of the business which seems quite interesting. I’m keen to explore further and may be open to jumping across if an opportunity comes up.

Coincidentally, my manager suggested that we pick up on that career progression discussion at our next catch up. Should I mention to him my recent interest in this other team (even though no open roles has come up)? My hope is that he would support my career progression goals and help facilitate an opportunity into the other team.

The worst case scenario is that I’ve misinterpreted his intentions (ie. he only wants to see me progress internally) and feels betrayed that I was exploring other opportunities. This is particularly so given he has recently supported my request for a short overseas educational stint which has really inspired me to consider more deliberately about my career…

Apologies for the rant! Thanks for any advice / suggestions…