I saw on the news that Manchester United doesn't have enough money to hire good goalkeepers and that's why David De Gea is the best option for Manchester United.
David Raya is also another player Ten Hag wants to hire him from Brentford. but I don't think they have enough money for it.
Oh yes, I've also read the news about this. Because previously, Ten Hag was certainly required to strengthen his squad this season. However, Man United has limited funds to strengthen each of its lines. Therefore, there are several players or positions where Ten Hag needs to continue to keep, sell, or loan the players. And indeed at this time, Man United really needs a forward and midfielder who is stronger than before. so, Man United may be more focused on finding new players for both positions. So, they might continue to keep De Gea in the goalkeeper position. In addition, de Gea's performance in the previous season was also quite good and satisfying, that's why they still continue to maintain and use de Gea.