Website requests is very slow

Hi,
Firstly, I'm so sorry if my English is difficult to understand as I'm not a native speaker and newbie in this field.
I'm building 2 websites that they get some information from other websites by a request. One website (Site 1) is hosting on a shared-hosting (2GB RAM, 1.2 CPU Cores) and another (Site 2) is hosting on a vps (2GB RAM, 1 Core).
The problem is Site 1 need only 10-15 seconds to finish the request above, but Site 2 need 40-60 seconds.
I try to figure out, and I think MySQL database is slow.
I try some test that I learn from this forum and here is the result:

Code:

# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync && rm -rf test
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 144.894 s, 7.4 MB/s

# mysqladmin ver
mysqladmin  Ver 9.1 Distrib 10.3.27-MariaDB, for Linux on x86_64
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Server version          10.3.27-MariaDB
Protocol version        10
Connection              Localhost via UNIX socket
UNIX socket             /var/lib/mysql/mysql.sock
Uptime:                 3 days 23 hours 54 min 26 sec

Threads: 11  Questions: 3082707  Slow queries: 26375  Opens: 80  Flush tables: 1  Open tables: 74  Queries per second avg: 8.928

I hope you can help me solve this problems.
Thank you very much!

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I don't know why but I got 98 on Google pagespeed.