Honestly, I have a hard time believing an SEO specialist who does not have his own site to showcase his service, and rank it in his chosen niche, if there is one, better to include it here.
When it comes to SEO, results and testimonials are very important.
I have to partially defend the OP, that is, the SEO business in general.
First, it is not to be expected that someone will publicly share information about their clients. This is not done for the protection of clients, so as not to affect their reputation. Such things can be considered inside information.
There is no way to prove that someone did SEO for a certain company, website or whatever. Apart from taking their word for it or if the client himself officially announces it somewhere (but this happens very rarely).
No bro he should go check Fiverr and you should see how these SEO specialist do their SEO, they show their graph and they show clients they worked with, not only on Fiverr but all freelance sites, and if it's an SEO company they have client page like this SEO companies that displayed their clients on their homepage https://cnetinfosystem.com/assured-seo.asp
OP's offer is incomplete I was looking for a platform where he can showcase his work like Fiverr or another freelance platform since he mentioned he is a freelancer or something like PM me for my works and my past clients like this SEO companies
I always maintain when it comes to SEO you should be transparent because it's a highly competitive niche it's not what he promised to do but what are the results from his past clients that he can provide.
We may not have a different perspective on this but I always maintain that SEO is all about past achievements and how you do it based on the graph that you can provide to your potential clients.
Chill bro for this good discussion
https://www.fiverr.com/awaisshab117/provides-high-authority-da-90-plus-seo-dofollow-backlinks