I copied examples/rp/src/bin/webrequest.rs to examples/rp235x/src/bin/c_webrequest.rs... changed the DEFAULT_CLOCK_DIVIDER to RM2_CLOCK_DIVIDER and modified it to display error type on send HTTP request failure.

Added the examples/rp/Cargo.toml lines for webrequest.rs to the examples/rp235x/Cargo.toml.

I tried both TLS mode and non-TLS mode and get different errors. I also added "embedded-tis" to the features list for reqwless crate and it didn't seem to make any difference.

Snippet of TLS debug log:
125.379454 [WARN ] Number of DNS servers exceeds DNS_MAX_SERVER_COUNT, truncating list. (embassy_net embassy-net/src/lib.rs:791)
125.380921 [INFO ] Stack is up! (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:122)
125.381420 [INFO ] connecting to https://worldtimeapi.org/api/timezone/Europe/Berlin (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:142)
125.384760 [DEBUG] address 10.0.0.1 not in neighbor cache, sending ARP request (smoltcp smoltcp-0.12.0/src/macros.rs:18)
125.560545 [DEBUG] start_record(Handshake(false)) (embedded_tls embedded-tls-0.17.0/src/fmt.rs:122)
126.047550 [DEBUG] received a keep-alive or window probe packet, will send an ACK (smoltcp smoltcp-0.12.0/src/macros.rs:18)
126.047937 [DEBUG] sending sACK option with current assembler ranges (smoltcp smoltcp-0.12.0/src/macros.rs:18)
126.150138 [ERROR] Failed to make HTTP request: Tls(IoError) (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:147)

snippet of non-TLS Debuge log (NB: i altered webrequesst to show the error type returned in error message"
6.528185 [WARN ] Number of DNS servers exceeds DNS_MAX_SERVER_COUNT, truncating list. (embassy_net embassy-net/src/lib.rs:791)
6.529657 [INFO ] Stack is up! (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:121)
6.530146 [INFO ] connecting to http://worldtimeapi.org/api/timezone/Europe/Berlin (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:141)
6.533481 [DEBUG] address 10.0.0.1 not in neighbor cache, sending ARP request (smoltcp smoltcp-0.12.0/src/macros.rs:18)
6.800721 [ERROR] Failed to send HTTP request: Network(ConnectionReset) (c_wifi_webrequest src/bin/c_wifi_webrequest.rs:155)

if there's anything else you need please let me know.