Sitting at the place of prayer and Salah, after finishing prayers : Angels will pray for him

 When the worshipper has finished praying and he sits in the place where he prayed, the angels pray for forgiveness for him, as is mentioned in the hadith which was narrated by al-Bukhaari (445) and Muslim (649) from Abu Hurayrah, according to which the Messenger of Allah (blessings and peace of Allah be upon him) said: “The angels pray for one of you so long as he remains in the place where he prayed, so long as he does not commit a sin. They say: ‘O Allah, forgive him; O Allah, have mercy on him.’”

According to another report narrated by al-Bukhaari and Muslim: “So long as he does not commit a sin there, so long as he does not cause annoyance to others there.

Refer Complete answer

https://islamqa.info/en/answers/131269/will-he-be-rewarded-for-sitting-in-the-mosque-after-praying-without-reciting-dhikr-or-waiting-for-the-next-prayer