Our Sheikh Yahya ibn 'Ali Al-Hajoori hafidhahullah said:

((استخفاء العمل عبادة، وهو دليل الإخلاص)) “Hiding one's deeds is an act of worship and it is an indication of sincerity.” Taken from ⤵️ https://sh-yahia.net/show_sound_12070.html He also mentions some other important points on publicising good deeds on social media