Ann: Important Shareholder Information Update with Link, page-38

Indeed that is so. The announcement appears to indicate the appointment was made with Mr Welker's blessing (even if it was in contravention of clause 9.1(a) in the Board Charter) :

ANNOUNCEMENT 3 May 2022
"Mr Welker, Managing Director of Medusa, commented:The Medusa Board members are delighted that Jeff will be taking the Executive Chairman role. He has provided an incredible amount of expertise to the Board and his vast leadership skills and relationships will be invaluable in progressing the Company through the next exciting phase. I personally look forward to working alongside Jeff as he continues to guide myself and the Board."

Which may leave readers pondering if x64action's raising of the point might seem just a tad specious...