Our youth indulge in useless self righteousness, their bad upbringing gives them psychic satisfaction in doing Takfeer & calling others names in religion! People do these things in ‘respect’ as per scholars there is nothing wrong, only Salafist literalists object to this Love. https://twitter.com/mehdi_nisar1/status/1302543384200978432

When Sayyiduna Ka’b Radi Allahu Anhu entered the masjid Talhah ibn ‘Ubayd-Allaah stood up, ran to him and greeted him, and congratulated him on Allaah’s forgiveness, and the Prophet ﷺ did not denounce this.

Sayyidah tun nisaa Faatimah tuzahraa Radi Allahu Anha would stand up for the Most beloved ﷺ when He would come to visit.

Hadrat Abu Huraira Radi Allahu Anhu narrates : ” The holy Prophet Muhammad ﷺ was seated with us in the masjid and speaking to us. When he rose to depart we all rose up with him and remained standing until he entered one of the houses of his wives.” *Sunan Abu Daood, Mishkaat.

”Banu Quraiza agreed to accept the verdict of Sa’ad bin Muadh RA, so Sayyiduna Rasool Allah ﷺ sent for Sa’ad RA & the latter came riding on a donkey, as he approached, the holy Prophet Muhammad ﷺ said, ‘Stand up for your leader or for the best amongst you’ *Bukhari 447*

So to stand is not an issue it’s from the Adaab.

With regards to covering the head whilst hearing the azaan it is not compulsory but a praiseworthy voluntary expression of respect for one of the major symbols of our religion–the call to prayer (adhan).

وَمَن يُعَظِّمْ شَعَائِرَ اللَّـهِ فَإِنَّهَا مِن تَقْوَى الْقُلُوبِ ﴿الحج: ٣

Both the questions fall under the above ayah
“ Whoever honours the signs/symbols of Allah, indeed it is from the piety of the hearts”