Hey! I know this feeling, I am also an international student (qualified overseas and completed an LLM in the UK).
After reading a lot of FAQs and speaking with some grad rec, I honestly believe that a PGDL is not advantageous. Firms primarily look at your undergraduate grades, and the PGDL won't compensate lower grades. Additionally, for TC purposes, you are considered a non-law candidate, which means that if a firm selects you, they will fund both the PGDL and the SQE.
Similar to LLM courses, the PGDL can demonstrate your commitment to becoming a solicitor and your interest in English law. However, unless you plan to move to the UK to build your network and attend firm events while studying in person or extend your stay with a graduate visa, I would not recommend self-funding the PGDL.
I would consider looking for a paralegal role to gain work experience, studying another undergraduate degree, or even pursuing a two-year LLB.