Hello there, i have this suggestions for you:
Norway: SK Brann Bergen, Stabaek Football, Fredrikstad;
Sweden: Halmstads, GAIS Gothenburg, Trelleborgs;
Denmark: Vejle BK, Hobro IK, SonderjyskE;
England: Notts County FC, Woking, Yeovil Town, York City, Dag(enham) and Red(brigde) FC , Dover Athletic, FC United of Manchester, Darlington;
Rep. of Ireland: Cork City FC, Waterford FC;
Poland: Lodzki, Wisla Krakow, Arka Gdynia, Polonia Warsaw;
Austria: SV Austria Salzburg (the real one), Grazer AK, Wacker Innsbruck;
Germany: BFC Dynamo Berlin, Lokomotive Leipzig (the first German champion), Carl Zeiss Jena, Energie Cottbus;
Romania: Dinamo Bucharest, Steaua Bucharest, Politechnica Timisoara;
Italy: Novara, Padova, Triestina, Vicenza, Reggiana, Siena, Foggia, Avellino, Crotone, Catania;
France: Le Mans, Sedan, Red Star Paris;
Netherlands: NAC Breda, ADO Den Haag, Willem II;
Switzerland: Neuchatel Xamax, Vaduz, Bellinzona, Aarau,
Scotland: Dundee FC, Inverness, Queens Park FC;
Belgium: Beveren, Lierse, Beerschot Antwerp;
Turkey: Goztepe Izmir, Altay, Adanaspor, Genclerbirligi Ankara;
Spain: Deportivo da Coruña, Córdoba, Recreativo Huelva (oldest club), Badajoz, Hercules, Salamanca, Real Murcia, Gimnastic Tarragona, Extremadura, Mérida;
Portugal: CF Os Belenenses (one time portuguese champion), Vitória FC Setúbal, Académica Coimbra (the oldest club in the Iberian Peninsula), Farense, Leixões, Académico Viseu, Sporting Covilhã, Salgueiros, Beira-Mar, União Leiria, Campomaiorense, FC Alverca;
I don't have FIFA 23 for PC, only for PS5, but these are my suggestions to increase career mode longevity. Cheers.
those are a few pictures of the kits and the crest