Nothing was said at the time but by end of the day I had received an e-mail from HR offering a salary increase and a change of job title (Same job, same role they just added {$department} Manager to it. Yes it worked, but only because I was fully prepared to follow through on the unspoken 'threat'.
On a more sane note, I would recommend doing some market research of comparable rates of pay. If you are able to demonstrate that your rate is significantly lower than the going market rate then you have a great deal of leverage when politely asking for a salary review.
I'm no longer in the market (semi-retired) so I don't have an eye on rates any more but would imagine that the Covid pandemic has impacted on many companies' finances. Personally if I was still in the job market and was being paid at about average or even slightly lower, I would stick where I was if the only reason to leave was to earn a bit more money.
If asking for a raise (and not prepared to move on if your request for an increase is denied) then see if you can get a sense of the company's finances (normally previous few years but in these times I would use the YTD instead as an indicator of how well the company was doing financially compared to ‘same date last year’ historical situation).
[Note, the Reddit post has been deleted by the /r/softwaredevelopment moderators so am responding based purely on the post title]
Finally, https://www.lifehack.org/829371/asking-for-a-raise has some great tips for anyone reading this in a similar situation.