I was just having a nosey at the teams ranked around us for the euro 2024 qualifiers to see what their goalkeeping situations are like. McLaughlin and Kelly might not be ideal once Gordon retires but there's a number of pot 2 and pot 3 teams who seem to cope with goalkeepers that are either average at best or who don't play regularly at club level.
Pot 2
France - Hugo Lloris
Austria - New manager seems to have decided on Lindner who is 33 and plays for Sion who are 5th in the Swiss league rather than Bachmann who I think was first choice back when we played them.
Czechia - Vaclik steady enough goalkeeper who plays regularly for Olympiakos
England - Pickford and Ramsdale
Wales - Hennessey who is Forest's backup and has played far more for Wales than at club level in the past 3 or 4 years
Israel - Marciano formerly of Hibs
Bosnia - Sehic plays regularly for Konyaspor in Turkey
Serbia - Have recently been picking between Torino's first choice and Sevilla's back up
Finland - Hradecky, regular first choice for Bayer Leverkusen
Pot 3
Ukraine - Buschchan of Dynamo Kyiv seemed to be first choice but was injured for the recent games and didn't look great in June. 2nd choice is Lunin the Real Madrid backup
Iceland - Runarsson who is out the picture at Arsenal and on loan to Alanyaspor
Norway - First choice seems to be Nyland who was backup at Villa, Norwich and Bournemouth the last few seasons before finishing last season playing for Reading. Was without a club until Leipzig signed him as backup at the weekend because of injury
Slovenia - Jan Oblak at Atletico Madrid
Ireland - Gavin Bazunu at Southampton
Albania - Berisha backup at Torino
Montenegro - Mijatovic is out playing in Saudi Arabia
Romania - Nita who now seems to be Sparta Prague's backup
Sweden - Olsen, Villa backup
Armenia - Yurchenko first choice for Pyunik in Armenia
I'm sure I'll have missed a world class goalkeeper who has just been injured over the past few international windows in my quick cross referencing of Wiki and Soccerway but having an excellent goalkeeper seems to be the exception rather than the rule once you get beyond the big countries that are pot 1 or top end of pot 2.