It is true that 2 #rakats before #fajr #salah is not #fard(compulsory). But they come under the category of Mustahab(recommended) because as we know that ONLY 5TIMES PRAYER is fard.
But this #sunnah of 2 rakat before fajr prayer #prophet (peace &blessings of ALLAAH be upon him) never left.
” It was narrated that ‘Aa’ishah (may Allaah be pleased with her) said: “The Prophet (peace and blessings of Allaah be upon him) did not adhere more firmly to any #naafil prayer than the two rak’ahs of Fajr.” Narrated by al-Bukhaari, 1163; #Muslim, 724. ”
If someone misses this sunnah he can pray after the Fajr salah
” The evidence for that is the report narrated by al-Tirmidhi (422) and Abu Dawood (1267) from Qays ibn ‘Amr who said: The #Messenger of Allaah (peace and blessings of Allaah be upon him) came out when the #iqaamah for prayer had been given, and I prayed Fajr with him, then the Prophet (#peace and #blessings of Allaah be upon him) finished and found me praying. He said, “Take it easy, O Qays. Two #prayers together?” I said, “O Messenger of Allaah, I did not pray the two rak’ahs before Fajr.” He said, “No, then.” According to the version narrated by Abu Dawood, the Messenger of #Allaah (peace and blessings of Allaah be upon him) remained silent.
This hadeeth was classed as saheeh by al-Albaani in Saheeh al-Tirmidhi. ”
There is a great virtue for this sunnah
Aishah (May Allah be pleased with her) reported:
The Prophet (ﷺ) said, “The two Rak’ah before the dawn (Fajr) prayer are better than this world and all it contains.
reference: riyad us saliheen Book 9, hadith 1102
If you want to leave this after fajr prayer you may, there is no sin upon you, but you will loose the addition reward