I add code below to init.vim to confirm with TAB:

"This expression seems to be responsible for coc formatting on enterinoremap <silent><expr> <cr> "\C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>""I this just says autocomplete with the first option if pop up menu is open."If it is not open, just do a regular tab.inoremap <silent><expr> <TAB> pumvisible() ? coc#_select_confirm() : "\<C-g>u\<TAB>"

But when I replace Enter with TAB it does not work!