If an employee can work mostly remotely, then that might suggest there was no good justification for them to be brought to the UK. They can work overseas for the firm without the need to be here. Your sponsor has duties they need to comply with. Working with little or no requirement to attend work premises or a client site
may suggest it is not a role that needs to have an overseas worker in the UK and the sponsor may be questioned on this. If your sponsor has not reported your working arrangements via SMS, their licence
might be at risk.
Note that the official 'Sponsor duties and compliance' document says the following:
You must, however, tell us, via your SMS account, if any sponsored worker
is, or will be, working entirely remotely, with little or no requirement to attend
your premises or a client site (a contractual home worker). In these cases,
we reserve the right to ask you to explain why you need to sponsor the
worker to come to the UK if (for example) they could work remotely from
their home country.
https://assets.publishing.service.gov.u ... 4_v1.0.pdf
Advice is given based on my personal research and experience only. Do NOT contact me via private message for immigration advice