Imposter syndrome after years in the job?

I'm a manager in a software company. When I joined the company almost 3 years ago the team was in burnout, with almost no workload management and with bad reputation with stakeholders.

I led through lay-offs & re-orgs, improved the relationship with stakeholders, created a workload management system, enabled a few individuals with almost no experience to grow in the team, provided coaching and "a shoulder to cry" (sometimes literally), I'm polite, good mood, include and invite everyone's opinion yet... I feel invisible.

Not any form of acknowledgement or kudos (other than group kudos).

A new manager joined not long ago,my team already said some good things about them...

I certainly have my shortcomings and I'm in perpetual learning but I'm not sure this indifference would be something I would do (or ever did) to my managers.

Have you felt the same? Any advice?