Researching covid deaths in Australia since 2020, I found ( According to the government A.B.S) that between 2020 to 2024, 2100 people had died of covid nationwide.
Influenza+ Colds average about 26 thousand deaths a year.
With that in mind, I would be looking at other causes.
Heart conditions are an ever increasing common condition nowadays. Causes are widespread and numerous, although not always obvious.
A professional investigation should establish the cause and best course of action.
I recommend seeing a functional medicine clinic not the general pill pushing poisoners.

You have natural immunity if unvaccinated. If you were vaccinated, then the question is was it the virus or the vaccination?
It's the reason new medicines have trials for 5 years before public release ie so long term data may be collected where any side effects that are not instant may be identified. Take care of yourself.

Be very careful.

A Navajo schoolteacher who worked for and was a close friend of my father got COVID. He even spent time intubated in the hospital.
They thought he got through it and they released him but he died of a heart attack at home a week later.

Pay attention to yourself and make sure assistance is always close by available.
again.

It's not just COVID that can cause cardiac arrhythmia, a serious viral or bacterial lung infection can bring it on. Sadly it happens more in the male population.
I think a member posted an article about it a while ago, sorry but I have no idea where to find it.
An internet search maybe for the article?
A good friend of mine had a serious lung infection the year before COVID hit and he now has cardiac arrhythmia.