One of the ways you can show solidarity with the people of Myanmar is to keep pressuring governments around the world to take action. A thread of compiled petitions you can sign/that emails representatives

Tell President Biden to impose further tough and targeted sanctions on Myanmar military https://actionnetwork.org/petitions/president-biden-impose-sanctions-on-myanmar-military

The EU to this day has not sanctioned the military, only imposing a holiday ban on 11 individuals. Please sign and urge them to impose targeted sanctions on military companies
https://action.burmacampaign.org.uk/urgent-action-european-union https://actionnetwork.org/petitions/urge-the-dail-eireann-to-enact-harsh-actions-on-the-myanmar-military

UK has announced plans to sanction military companies, now let' demand for a global arms embargo against the military junta in Myanmar. https://action.burmacampaign.org.uk/uk-sanction-military-companies

Urge the UN to intervene in Myanmar with a peace keeping force https://petition.parliament.uk/petitions/577765

Request to Foreign Minister Heiko Maas to not do business with the military in Myanmar. Germany has not imposed sanctions of any kind and it is important to pressure them to do so. https://actionnetwork.org/petitions/aufforderung-an-aussenminister-heiko-maas-keine-geschafte-mit-dem-militar-in-myanmar

Urge your elected representatives to stand with the people of Myanmar. There is a letter template in the link which you can use to submit to your rep anywhere in the world: https://burmacampaign.org.uk/take-action/ask-your-elected-representative-to-help-the-people-of-myanmar/
A Singaporean-specific one can be found here: https://docs.google.com/document/d/1-MF6SHlaUj09JwlGpE3ZUM1cRWvuFJFRhEUKRzW74Y8/mobilebasic