If a monitor could literally kill her (ankle monitor wasn't used due to deep vein thrombosis) it's hard to imagine her being much danger to the public.

It sounds like all she did was to block traffic, similar to many of these truck blockades the US, Canada, India, and I'm sure other conservative protesters have used to no punishment. Unlike them, she even is sorry, but felt she had no choice and it also sounds like they won because the government seemingly has agreed to the protestor's demands.

From an older article:

At the time of her sentencing Delap said: 'I've had to read the evidence of people who were stuck in our traffic, it hurts me. I'm sorry I had to do this.

'But we really have no other option. They didn't listen to the scientists, they didn't listen to their constituents, so we had to cause disruption in order to communicate the seriousness of humanity's predicament.'

Ahead of the hearing Mr Sousek added: 'No New Oil' was the demand from Just Stop Oil right from the start. Now most political parties agree and it has become government policy.

'How come we are being jailed for pushing for, what is now, government policy? Kafka couldn't make it up.'

Sounds like the company is in violation of disability laws

Is this just a case of the law being too prescriptive on the need for a tag or the probation system not being flexible enough to arrange an alternative? It sounds like she was monitored during the pre-trial period without issue.