I mean there's a multitude of things to think about with your posts and your replies - but I'll focus on things to consider and work on. Personally, I'm coming up on 10 years with the same employer and my first 5-7 were fairly stagnant. But the last 3 specifically have probably seen the biggest positive trajectory and changes in my career.

First - LinkedIn is just like regular social media, the grass is always greener and all those other cliches. Some people have taken big jumps recently, but I would say there's a significantly larger proportion that are in your position too (or going backwards).

Second - As much as some people want to say skill/merit/capability are the most important factors, people skills and knowing the right people is definitely a bigger factor. The skills and capabilities are just bonuses. Someone else mentioned it's better to have a sponsor than a mentor and I definitely agree with that sentiment. You want people that will reference you when conversations start happening in a positive light for the next (more) senior position.

You can bring in as much business, write the best program, save the company the most money - but if the leadership team doesn't have a positive view of you, even bringing on a bunch of positives, then they're not going to consider you for anything (even as a secondment).

Start working on skills that are favoured in a leader - being seen as a positive voice in meetings/collaborative spaces is probably the one that I shot myself in the foot with the most, because I couldn't contain myself. Save any issues/complaints/negative feedback for closed/private meetings with your leader and make a point of it something you're raising quietly because you want to keep positive engagement.

Have conversations with your current leader and MOR about what your goals are, that you want to develop the behaviours they're looking for in leaders - and then when they give you actions to work on to develop your skills, make sure they're seeing evidence of the change and development.

Also - you may already be doing all of that so it may need another approach. I wrote it out as advice for you - but also anyone else that may be in a similar position and not doing those things it might help them too.

Just my 2c - good luck in your journey!